Hellfire (Card)

Hellfire
In 296 decks 0% of 2015675 decks
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Top Commanders (1)
Sliver Queen
1.09% of 1379 decks 15 decks
New Cards (5)
Raucous Theater
45% of 11 decks +41% synergy
Insatiable Avarice
38% of 8 decks +32% synergy
Tinybones, the Pickpocket
38% of 8 decks +31% synergy
V.A.T.S.
27% of 11 decks +24% synergy
Rakdos, Patron of Chaos
27% of 11 decks +25% synergy
High Synergy Cards (10)
Hazezon Tamar
59% of 27 decks +59% synergy
Angus Mackenzie
59% of 27 decks +59% synergy
Tetsuo Umezawa
45% of 51 decks +45% synergy
Rasputin Dreamweaver
42% of 40 decks +42% synergy
Adun Oakenshield
41% of 39 decks +41% synergy
Gwendlyn Di Corci
39% of 51 decks +39% synergy
Bedevil
39% of 76 decks +36% synergy
Riding the Dilu Horse
36% of 45 decks +36% synergy
Survival of the Fittest
36% of 45 decks +35% synergy
Ifh-Bíff Efreet
34% of 50 decks +34% synergy
Top Cards (10)
Dark Ritual
44% of 295 decks +33% synergy
Feed the Swarm
40% of 234 decks +30% synergy
Crypt Ghast
36% of 254 decks +34% synergy
Damnation
36% of 255 decks +31% synergy
Singing Tree
34% of 50 decks +34% synergy
Eureka
34% of 50 decks +34% synergy
Moat
34% of 56 decks +34% synergy
Gray Merchant of Asphodel
34% of 254 decks +29% synergy
Bloodletter of Aclazotz
33% of 39 decks +29% synergy
Toxic Deluge
32% of 253 decks +24% synergy
Creatures (50)
Wolf Pack
31% of 45 decks +31% synergy
Thunder Spirit
30% of 56 decks +30% synergy
King Suleiman
30% of 56 decks +30% synergy
Argivian Archaeologist
30% of 56 decks +30% synergy
Gilded Drake
29% of 62 decks +28% synergy
Old Man of the Sea
25% of 79 decks +25% synergy
Venomthrope
23% of 13 decks +23% synergy
Herald of Slaanesh
23% of 48 decks +22% synergy
Serendib Djinn
23% of 79 decks +23% synergy
Lady Sun
23% of 62 decks +23% synergy
Sheoldred, the Apocalypse
22% of 169 decks +19% synergy
Zhao Zilong, Tiger General
21% of 52 decks +21% synergy
Edgar Markov
21% of 24 decks +21% synergy
Bloodthirster
21% of 48 decks +20% synergy
Willow Satyr
20% of 50 decks +20% synergy
Ali from Cairo
19% of 111 decks +19% synergy
Ignoble Hierarch
19% of 16 decks +16% synergy
Zodiac Dragon
18% of 92 decks +18% synergy
Kardur, Doomscourge
18% of 66 decks +17% synergy
Birds of Paradise
18% of 50 decks +6% synergy
K'rrik, Son of Yawgmoth
18% of 240 decks +17% synergy
Orcish Bowmasters
18% of 84 decks +11% synergy
Dong Zhou, the Tyrant
17% of 92 decks +17% synergy
Yuan Shao, the Indecisive
17% of 92 decks +17% synergy
Zhang Fei, Fierce Warrior
17% of 52 decks +17% synergy
Dauthi Voidwalker
17% of 222 decks +12% synergy
Rakdos, the Showstopper
17% of 76 decks +17% synergy
Glissa Sunslayer
17% of 18 decks +15% synergy
Hidetsugu, Devouring Chaos
16% of 61 decks +16% synergy
Phyrexian Obliterator
16% of 254 decks +15% synergy
Vein Ripper
16% of 25 decks +14% synergy
Mayhem Devil
16% of 76 decks +13% synergy
Solemn Simulacrum
16% of 257 decks +1% synergy
Lady Zhurong, Warrior Queen
16% of 45 decks +16% synergy
Sheoldred
15% of 97 decks +13% synergy
Vilis, Broker of Blood
15% of 240 decks +14% synergy
Ob Nixilis, Captive Kingpin
15% of 26 decks +15% synergy
Clone
15% of 79 decks +15% synergy
Rakdos, Lord of Riots
15% of 81 decks +14% synergy
Balor
15% of 55 decks +14% synergy
Sheoldred, Whispering One
14% of 254 decks +11% synergy
Treasonous Ogre
14% of 80 decks +13% synergy
Valki, God of Lies
14% of 66 decks +13% synergy
Barbed Servitor
14% of 22 decks +13% synergy
Snarling Gorehound
14% of 22 decks +13% synergy
Master of Cruelties
14% of 81 decks +13% synergy
Two-Headed Giant of Foriys
14% of 111 decks +14% synergy
Mikaeus, the Unhallowed
13% of 254 decks +12% synergy
Norwood Priestess
13% of 45 decks +13% synergy
Heliod, Sun-Crowned
13% of 38 decks +12% synergy
Instants (50)
Vampiric Tutor
36% of 268 decks +26% synergy
Assassin's Trophy
32% of 34 decks +26% synergy
Mana Drain
29% of 79 decks +22% synergy
Intuition
29% of 62 decks +28% synergy
Malakir Rebirth
27% of 235 decks +23% synergy
Natural Selection
26% of 50 decks +26% synergy
Counterspell
25% of 79 decks +4% synergy
Swords to Plowshares
25% of 56 decks -3% synergy
Beast Within
21% of 38 decks +2% synergy
Snuff Out
21% of 259 decks +20% synergy
Chaos Warp
21% of 82 decks +5% synergy
Anguished Unmaking
19% of 43 decks +13% synergy
Terminate
18% of 83 decks +13% synergy
Lightning Bolt
18% of 111 decks +13% synergy
Bitter Triumph
18% of 39 decks +15% synergy
Rakdos Charm
17% of 81 decks +14% synergy
Blood for the Blood God!
17% of 41 decks +16% synergy
Infernal Grasp
17% of 213 decks +13% synergy
Blaze of Glory
16% of 56 decks +16% synergy
Deadly Rollick
16% of 239 decks +11% synergy
Fire Covenant
16% of 95 decks +15% synergy
Cyclonic Rift
15% of 53 decks +1% synergy
Deathsprout
15% of 34 decks +14% synergy
Darkness
14% of 295 decks +14% synergy
Boomerang
14% of 79 decks +14% synergy
Heroic Intervention
14% of 36 decks +0% synergy
Tear Asunder
13% of 23 decks +12% synergy
Cabal Ritual
13% of 259 decks +10% synergy
Remove Soul
13% of 79 decks +13% synergy
Imp's Mischief
13% of 255 decks +11% synergy
Sheoldred's Edict
12% of 124 decks +10% synergy
Deflecting Swat
12% of 75 decks +4% synergy
Tibalt's Trickery
12% of 67 decks +9% synergy
Terror
12% of 295 decks +11% synergy
Enlightened Tutor
11% of 53 decks +3% synergy
Defile
11% of 242 decks +9% synergy
Deadly Dispute
11% of 216 decks +5% synergy
Fierce Guardianship
11% of 47 decks +2% synergy
Dismember
10% of 254 decks +9% synergy
Sudden Spoiling
10% of 255 decks +9% synergy
Red Elemental Blast
10% of 111 decks +7% synergy
Hurl Through Hell
10% of 62 decks +9% synergy
Entomb
10% of 259 decks +6% synergy
Force of Despair
10% of 242 decks +9% synergy
Hatred
9% of 267 decks +9% synergy
Hagra Mauling
9% of 235 decks +8% synergy
Soul Shatter
9% of 235 decks +7% synergy
Angel's Grace
9% of 45 decks +8% synergy
Flash Counter
9% of 79 decks +9% synergy
Blue Elemental Blast
9% of 79 decks +9% synergy
Sorceries (50)
Demonic Tutor
48% of 295 decks +36% synergy
Timetwister
29% of 79 decks +28% synergy
Torment of Hailfire
28% of 247 decks +25% synergy
Wheel of Fortune
28% of 111 decks +25% synergy
Ravages of War
27% of 52 decks +27% synergy
Reanimate
25% of 268 decks +17% synergy
Acid Rain
24% of 79 decks +24% synergy
Blasphemous Act
22% of 82 decks +6% synergy
Nature's Lore
22% of 46 decks +7% synergy
Transmute Artifact
22% of 79 decks +21% synergy
Wrath of God
21% of 56 decks +18% synergy
Exsanguinate
21% of 254 decks +18% synergy
Farseek
21% of 38 decks +5% synergy
Time Spiral
21% of 62 decks +21% synergy
Sign in Blood
20% of 254 decks +15% synergy
Night's Whisper
20% of 255 decks +15% synergy
Agadeem's Awakening
18% of 235 decks +16% synergy
Three Visits
18% of 45 decks +6% synergy
Casualties of War
18% of 34 decks +17% synergy
Jeska's Will
17% of 72 decks +8% synergy
Yawgmoth's Will
16% of 267 decks +16% synergy
Beseech the Mirror
16% of 67 decks +14% synergy
Cultivate
16% of 38 decks -7% synergy
Vindicate
16% of 45 decks +14% synergy
Grim Tutor
15% of 259 decks +13% synergy
Braingeyser
15% of 79 decks +15% synergy
Bubbling Muck
15% of 266 decks +14% synergy
Mutilate
15% of 259 decks +14% synergy
Capture of Jingzhou
15% of 62 decks +14% synergy
Dreadbore
14% of 81 decks +13% synergy
Shatterskull Smashing
14% of 74 decks +12% synergy
Ashes to Ashes
13% of 284 decks +13% synergy
Day of Judgment
13% of 45 decks +12% synergy
Kodama's Reach
13% of 38 decks -2% synergy
Living Death
13% of 268 decks +10% synergy
Wheel of Misfortune
12% of 72 decks +10% synergy
Faithless Looting
12% of 82 decks +4% synergy
Healing Technique
11% of 27 decks +11% synergy
Culling Ritual
11% of 27 decks +9% synergy
Rishkar's Expertise
11% of 36 decks +6% synergy
Rampant Growth
11% of 45 decks -5% synergy
Read the Bones
11% of 254 decks +7% synergy
Demonfire
11% of 83 decks +11% synergy
Decree of Pain
11% of 256 decks +9% synergy
Supreme Verdict
10% of 29 decks +7% synergy
Damn
10% of 29 decks +6% synergy
Recall
10% of 79 decks +10% synergy
Peer into the Abyss
10% of 239 decks +8% synergy
Desert Twister
10% of 50 decks +10% synergy
All Hallow's Eve
10% of 295 decks +10% synergy
Utility Artifacts (38)
Jet Medallion
28% of 269 decks +26% synergy
Lightning Greaves
27% of 257 decks +2% synergy
Bolas's Citadel
23% of 242 decks +17% synergy
Swiftfoot Boots
21% of 255 decks -7% synergy
Expedition Map
20% of 255 decks +16% synergy
Mithril Coat
17% of 86 decks +11% synergy
Wayfarer's Bauble
16% of 256 decks +5% synergy
Whip of Erebos
16% of 254 decks +14% synergy
Skullclamp
15% of 256 decks +2% synergy
Gauntlet of Might
14% of 111 decks +13% synergy
The One Ring
12% of 108 decks +3% synergy
Shadowspear
11% of 240 decks +8% synergy
Sensei's Divining Top
11% of 256 decks +4% synergy
Ashnod's Altar
9% of 296 decks +2% synergy
Lashwrithe
9% of 254 decks +9% synergy
Tawnos's Coffin
8% of 296 decks +8% synergy
Mirror Universe
8% of 296 decks +8% synergy
Phyrexian Altar
8% of 260 decks +4% synergy
Birthing Pod
8% of 38 decks +7% synergy
Forcefield
8% of 296 decks +8% synergy
Nevinyrral's Disk
8% of 296 decks +6% synergy
Blackblade Reforged
8% of 246 decks +3% synergy
Bontu's Monument
8% of 248 decks +5% synergy
Commander's Plate
7% of 232 decks +5% synergy
Candelabra of Tawnos
7% of 296 decks +7% synergy
Aetherflux Reservoir
6% of 248 decks +2% synergy
Cyclopean Tomb
6% of 296 decks +6% synergy
City in a Bottle
6% of 296 decks +6% synergy
Mask of Griselbrand
6% of 214 decks +5% synergy
Anvil of Bogardan
6% of 269 decks +6% synergy
Nightmare Lash
6% of 257 decks +6% synergy
Illusionary Mask
6% of 296 decks +6% synergy
Howling Mine
6% of 296 decks +4% synergy
Alhammarret's Archive
6% of 251 decks +3% synergy
Ring of Ma'rûf
5% of 296 decks +5% synergy
Pact Weapon
5% of 185 decks +5% synergy
Darksteel Plate
5% of 255 decks +3% synergy
Pyramids
5% of 296 decks +5% synergy
Enchantments (50)
Phyrexian Arena
32% of 259 decks +25% synergy
Drop of Honey
32% of 50 decks +32% synergy
Living Plane
32% of 50 decks +32% synergy
Black Market Connections
29% of 179 decks +23% synergy
Divine Intervention
29% of 56 decks +29% synergy
Power Artifact
28% of 79 decks +28% synergy
Necropotence
28% of 276 decks +25% synergy
Field of Dreams
23% of 79 decks +23% synergy
Animate Dead
22% of 295 decks +17% synergy
Earthcraft
22% of 45 decks +22% synergy
In the Eye of Chaos
22% of 79 decks +22% synergy
Land Equilibrium
22% of 79 decks +22% synergy
Sylvan Library
20% of 50 decks +14% synergy
Grave Pact
19% of 267 decks +17% synergy
The Meathook Massacre
17% of 214 decks +15% synergy
Raging River
16% of 111 decks +16% synergy
Bitterblossom
16% of 254 decks +14% synergy
Greed
16% of 295 decks +14% synergy
Phyrexian Reclamation
15% of 267 decks +13% synergy
Oubliette
14% of 295 decks +13% synergy
Exquisite Blood
13% of 254 decks +10% synergy
Virtue of Persistence
13% of 62 decks +11% synergy
Black Market
13% of 259 decks +10% synergy
No Mercy
13% of 267 decks +12% synergy
Mystic Remora
12% of 66 decks +3% synergy
Gate to Phyrexia
12% of 295 decks +12% synergy
Theater of Horrors
12% of 76 decks +11% synergy
Anointed Procession
12% of 43 decks +7% synergy
Descent into Avernus
11% of 56 decks +9% synergy
Land Tax
11% of 56 decks +8% synergy
Smothering Tithe
10% of 39 decks -2% synergy
The Abyss
10% of 295 decks +10% synergy
Chains of Mephistopheles
10% of 295 decks +10% synergy
Underworld Dreams
10% of 295 decks +9% synergy
Bitter Reunion
10% of 41 decks +9% synergy
Underworld Breach
9% of 75 decks +6% synergy
City on Fire
9% of 33 decks +6% synergy
Liliana's Contract
9% of 243 decks +8% synergy
Gift of Immortality
9% of 45 decks +8% synergy
Copy Artifact
9% of 79 decks +8% synergy
Wilderness Reclamation
9% of 34 decks +7% synergy
Pestilence
9% of 295 decks +8% synergy
Nether Void
8% of 295 decks +8% synergy
Dictate of Erebos
8% of 252 decks +6% synergy
Sanguine Bond
8% of 254 decks +5% synergy
Dreadhorde Invasion
8% of 242 decks +7% synergy
Wild Growth
8% of 50 decks +3% synergy
Doubling Season
8% of 38 decks +4% synergy
Necromancy
8% of 268 decks +6% synergy
Blood Moon
8% of 103 decks +6% synergy
Planeswalkers (10)
Ob Nixilis, the Adversary
25% of 59 decks +25% synergy
Liliana of the Dark Realms
16% of 254 decks +15% synergy
Liliana, Dreadhorde General
11% of 242 decks +9% synergy
Zariel, Archduke of Avernus
8% of 64 decks +7% synergy
Tevesh Szat, Doom of Fools
7% of 232 decks +6% synergy
Sorin, Lord of Innistrad
7% of 45 decks +6% synergy
Tibalt, Rakish Instigator
6% of 77 decks +6% synergy
Vraska, Betrayal's Sting
6% of 126 decks +4% synergy
Sorin Markov
6% of 254 decks +5% synergy
Ob Nixilis Reignited
6% of 250 decks +5% synergy
Utility Lands (50)
Urborg, Tomb of Yawgmoth
58% of 256 decks +47% synergy
Cabal Coffers
53% of 259 decks +47% synergy
Bojuka Bog
39% of 254 decks +23% synergy
Gaea's Cradle
38% of 45 decks +35% synergy
Serra's Sanctum
37% of 52 decks +36% synergy
Nykthos, Shrine to Nyx
31% of 255 decks +25% synergy
Phyrexian Tower
28% of 267 decks +24% synergy
Castle Locthwain
27% of 240 decks +23% synergy
Cabal Stronghold
25% of 245 decks +23% synergy
Volrath's Stronghold
24% of 267 decks +24% synergy
Ancient Tomb
23% of 269 decks +12% synergy
Takenuma, Abandoned Mire
23% of 200 decks +17% synergy
Boseiju, Who Endures
22% of 27 decks +13% synergy
Lake of the Dead
22% of 272 decks +21% synergy
The Black Gate
20% of 84 decks +18% synergy
Reliquary Tower
20% of 255 decks -9% synergy
Shizo, Death's Storehouse
19% of 255 decks +16% synergy
Witch's Cottage
16% of 240 decks +14% synergy
Westvale Abbey
16% of 249 decks +14% synergy
Mines of Moria
15% of 26 decks +13% synergy
Rogue's Passage
15% of 255 decks -3% synergy
Strip Mine
15% of 296 decks +12% synergy
War Room
13% of 232 decks +7% synergy
Urborg
12% of 295 decks +12% synergy
Vault of the Archangel
11% of 45 decks +9% synergy
Otawara, Soaring City
11% of 37 decks +2% synergy
Crypt of Agadeem
10% of 254 decks +9% synergy
Maze of Ith
10% of 285 decks +7% synergy
Command Beacon
10% of 251 decks +5% synergy
Minas Morgul, Dark Fortress
10% of 42 decks +8% synergy
Cephalid Coliseum
9% of 54 decks +8% synergy
Yavimaya Hollow
9% of 44 decks +9% synergy
Urza's Saga
9% of 221 decks +2% synergy
Barren Moor
9% of 259 decks +7% synergy
Deserted Temple
9% of 260 decks +8% synergy
The Tabernacle at Pendrell Vale
8% of 296 decks +8% synergy
Geier Reach Sanitarium
8% of 250 decks +5% synergy
Barad-dûr
8% of 84 decks +6% synergy
Thespian's Stage
8% of 255 decks +6% synergy
Hammerheim
8% of 111 decks +8% synergy
Castle Ardenvale
8% of 38 decks +5% synergy
Temple of the False God
8% of 257 decks -2% synergy
Hall of Heliod's Generosity
8% of 39 decks +5% synergy
High Market
8% of 260 decks +4% synergy
Tolaria
8% of 79 decks +8% synergy
Flamekin Village
8% of 80 decks +7% synergy
Diamond Valley
7% of 296 decks +7% synergy
Spinerock Knoll
7% of 82 decks +5% synergy
Bazaar of Baghdad
7% of 296 decks +7% synergy
City of Traitors
7% of 268 decks +6% synergy
Mana Artifacts (43)
Sol Ring
73% of 296 decks -11% synergy
Arcane Signet
52% of 241 decks -19% synergy
Rakdos Signet
39% of 82 decks +32% synergy
Talisman of Indulgence
37% of 83 decks +32% synergy
Throne of Eldraine
27% of 56 decks +24% synergy
Mana Crypt
26% of 282 decks +15% synergy
Dimir Signet
23% of 52 decks +15% synergy
Talisman of Dominance
23% of 53 decks +15% synergy
Charcoal Diamond
19% of 271 decks +16% synergy
Orzhov Signet
18% of 45 decks +11% synergy
Mana Vault
17% of 296 decks +10% synergy
Jeweled Lotus
16% of 232 decks +9% synergy
Mind Stone
16% of 269 decks -2% synergy
Fellwar Stone
16% of 285 decks -5% synergy
Thought Vessel
15% of 251 decks -1% synergy
Talisman of Creativity
15% of 27 decks +8% synergy
Talisman of Resilience
15% of 34 decks +13% synergy
Mox Diamond
13% of 268 decks +9% synergy
Golgari Signet
13% of 38 decks +10% synergy
Talisman of Hierarchy
13% of 39 decks +7% synergy
Simic Signet
12% of 26 decks +8% synergy
Grim Monolith
11% of 268 decks +9% synergy
Caged Sun
11% of 255 decks +8% synergy
Izzet Signet
10% of 31 decks +3% synergy
Nyx Lotus
9% of 240 decks +7% synergy
Fire Diamond
9% of 92 decks +6% synergy
Extraplanar Lens
8% of 257 decks +7% synergy
Chrome Mox
8% of 257 decks +2% synergy
Rakdos Keyrune
7% of 81 decks +7% synergy
Lion's Eye Diamond
7% of 272 decks +6% synergy
Staff of Compleation
7% of 125 decks +5% synergy
Thran Dynamo
7% of 267 decks +2% synergy
Sceptre of Eternal Glory
6% of 156 decks +5% synergy
Sky Diamond
6% of 63 decks +3% synergy
Gauntlet of Power
6% of 256 decks +5% synergy
Gilded Lotus
6% of 257 decks +3% synergy
Cursed Mirror
6% of 66 decks +4% synergy
Commander's Sphere
6% of 251 decks -11% synergy
Worn Powerstone
6% of 268 decks +3% synergy
Everflowing Chalice
6% of 255 decks +1% synergy
Basalt Monolith
6% of 296 decks +3% synergy
Chromatic Lantern
5% of 255 decks -4% synergy
Lotus Petal
5% of 269 decks -1% synergy
Lands (50)
Ziatora's Proving Ground
69% of 16 decks +65% synergy
Scrubland
64% of 56 decks +61% synergy
Blood Crypt
63% of 82 decks +54% synergy
Underground Sea
62% of 78 decks +58% synergy
Bayou
58% of 50 decks +55% synergy
Tundra
55% of 40 decks +52% synergy
Taiga
54% of 39 decks +51% synergy
Volcanic Island
54% of 52 decks +51% synergy
Badlands
54% of 110 decks +51% synergy
Plateau
52% of 33 decks +49% synergy
Tropical Island
52% of 33 decks +48% synergy
Zagoth Triome
48% of 21 decks +44% synergy
Xander's Lounge
47% of 17 decks +43% synergy
Raffine's Tower
47% of 17 decks +43% synergy
Savannah
46% of 28 decks +44% synergy
Overgrown Tomb
42% of 38 decks +33% synergy
Savai Triome
40% of 20 decks +37% synergy
Smoldering Marsh
39% of 79 decks +32% synergy
Watery Grave
38% of 52 decks +28% synergy
Luxury Suite
38% of 76 decks +32% synergy
Indatha Triome
38% of 16 decks +34% synergy
Haunted Ridge
37% of 62 decks +33% synergy
Sulfurous Springs
36% of 95 decks +32% synergy
Godless Shrine
36% of 45 decks +26% synergy
Dragonskull Summit
35% of 81 decks +28% synergy
Shattered Sanctum
31% of 29 decks +28% synergy
Command Tower
30% of 255 decks -43% synergy
Caves of Koilos
29% of 45 decks +23% synergy
Darkbore Pathway
29% of 28 decks +27% synergy
Deathcap Glade
26% of 27 decks +23% synergy
Blightstep Pathway
26% of 66 decks +23% synergy
Underground River
25% of 65 decks +20% synergy
Isolated Chapel
24% of 45 decks +19% synergy
Rakdos Carnarium
24% of 82 decks +21% synergy
Shipwreck Marsh
24% of 38 decks +19% synergy
Graven Cairns
23% of 81 decks +22% synergy
Temple of Silence
22% of 45 decks +18% synergy
Sunken Hollow
22% of 50 decks +13% synergy
Canyon Slough
22% of 79 decks +20% synergy
Nomad Outpost
21% of 24 decks +18% synergy
Orzhov Basilica
20% of 45 decks +16% synergy
Vault of Champions
19% of 36 decks +13% synergy
Steam Vents
19% of 31 decks +10% synergy
Tainted Peak
19% of 83 decks +17% synergy
Breeding Pool
19% of 26 decks +10% synergy
Bloodstained Mire
19% of 260 decks +9% synergy
Morphic Pool
19% of 48 decks +12% synergy
Myriad Landscape
19% of 251 decks -2% synergy
Stomping Ground
19% of 27 decks +9% synergy
Llanowar Wastes
18% of 38 decks +13% synergy