Gravestorm (Card)

Gravestorm
In 2248 decks 0% of 2574668 decks
Jeff Dunn
The 10 Best Mel Commanders
Mel commanders are lauded as the best-designed legendaries, or as perfect enablers for digging out edge case interactions. Here are the top ten!
Trent Trombley
Sep 2, 2021
Reconstruct History — Phyrexian Arena
How have black's traditional card draw options held up in EDH?
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Umbris, Fear Manifest
8.81% of 5911 decks 521 decks
Obeka, Splitter of Seconds
3.69% of 10684 decks 394 decks
Lord Skitter, Sewer King
11.18% of 644 decks 72 decks
Omnath, Locus of All
0.49% of 13927 decks 68 decks
Gisa, the Hellraiser
1.81% of 2989 decks 54 decks
Zur the Enchanter
0.43% of 11281 decks 49 decks
Marrow-Gnawer
0.39% of 9172 decks 36 decks
K'rrik, Son of Yawgmoth
0.25% of 14247 decks 35 decks
Sheoldred, the Apocalypse
0.36% of 9421 decks 34 decks
Taigam, Sidisi's Hand
6.16% of 422 decks 26 decks
Erebos, God of the Dead
2.16% of 1160 decks 25 decks
Karumonix, the Rat King
0.29% of 6181 decks 18 decks
Ayara, First of Locthwain
0.37% of 4923 decks 18 decks
Skeleton Ship
2.07% of 774 decks 16 decks
Anafenza, the Foremost
1.37% of 1094 decks 15 decks
Volrath the Fallen
1.84% of 761 decks 14 decks
Aphemia, the Cacophony
5.06% of 257 decks 13 decks
Mogis, God of Slaughter
0.35% of 3750 decks 13 decks
New Cards
The Mindskinner
43% of 162 decks +40% synergy
Silent Hallcreeper
39% of 169 decks +33% synergy
Withering Torment
30% of 260 decks +11% synergy
Blazemire Verge
28% of 65 decks +8% synergy
Gloomlake Verge
26% of 183 decks +9% synergy
High Synergy Cards
Court of Embereth
55% of 552 decks +53% synergy
Generous Plunderer
49% of 235 decks +46% synergy
Dreadwing Scavenger
53% of 19 decks +46% synergy
Court of Ire
44% of 694 decks +42% synergy
Dragonmaster Outcast
44% of 698 decks +42% synergy
Plargg and Nassari
40% of 589 decks +38% synergy
Tasha's Hideous Laughter
37% of 1302 decks +36% synergy
Court of Vantress
35% of 885 decks +32% synergy
Ashiok, Nightmare Muse
33% of 1303 decks +32% synergy
Endless Evil
32% of 1258 decks +31% synergy
Top Cards
Sanguine Syphoner
50% of 8 decks +31% synergy
Counterspell
46% of 1314 decks +3% synergy
Abyssal Harvester
44% of 36 decks +29% synergy
Phyrexian Arena
37% of 2248 decks +22% synergy
Swords to Plowshares
37% of 337 decks -26% synergy
Swiftfoot Boots
34% of 2223 decks +6% synergy
Blasphemous Edict
33% of 58 decks -1% synergy
Ruinous Ultimatum
33% of 129 decks +14% synergy
Dark Ritual
32% of 2248 decks +10% synergy
Ancient Cellarspawn
32% of 204 decks +27% synergy
Creatures
Soul-Shackled Zombie
50% of 6 decks +36% synergy
Jhoira of the Ghitu
30% of 547 decks +29% synergy
Laughing Jasper Flint
30% of 298 decks +26% synergy
Grazilaxx, Illithid Scholar
29% of 1302 decks +27% synergy
Spellskite
29% of 1308 decks +26% synergy
Scrawling Crawler
29% of 80 decks +22% synergy
Jetmir, Nexus of Revels
29% of 91 decks +21% synergy
Sire of Stagnation
28% of 1308 decks +25% synergy
Bonehoard Dracosaur
27% of 500 decks +24% synergy
Creakwood Liege
27% of 180 decks +25% synergy
Captain N'ghathrod
26% of 1258 decks +25% synergy
Zellix, Sanity Flayer
25% of 1258 decks +23% synergy
Sludge Monster
25% of 1299 decks +24% synergy
Skyline Despot
25% of 697 decks +23% synergy
Nemesis of Reason
22% of 1309 decks +20% synergy
Dryad of the Ilysian Grove
21% of 179 decks +13% synergy
Aboleth Spawn
20% of 1258 decks +19% synergy
Hullbreaker Horror
20% of 1286 decks +13% synergy
Wharf Infiltrator
20% of 1307 decks +19% synergy
Dauthi Voidwalker
19% of 2193 decks +12% synergy
Deathless Knight
18% of 179 decks +18% synergy
Blood Tyrant
18% of 546 decks +18% synergy
The Ninth Doctor
18% of 452 decks +16% synergy
Creeping Bloodsucker
18% of 1836 decks +15% synergy
Shaun, Father of Synths
18% of 340 decks +16% synergy
Thing in the Ice
17% of 1307 decks +17% synergy
Ravenous Chupacabra
17% of 2217 decks +13% synergy
Horrid Shadowspinner
17% of 305 decks +16% synergy
Birds of Paradise
16% of 182 decks -11% synergy
Gray Merchant of Asphodel
16% of 2223 decks +7% synergy
Twilight Prophet
16% of 2217 decks +13% synergy
Sin Prodder
16% of 697 decks +16% synergy
Divinity of Pride
16% of 337 decks +15% synergy
Uchuulon
16% of 2107 decks +15% synergy
Quakebringer
15% of 694 decks +15% synergy
Toxrill, the Corrosive
15% of 1286 decks +12% synergy
Yarok's Fenlurker
15% of 2209 decks +15% synergy
Overlord of the Balemurk
15% of 164 decks +9% synergy
Thassa, God of the Sea
15% of 1308 decks +13% synergy
Roaming Throne
15% of 1206 decks +5% synergy
Deathbringer Liege
15% of 337 decks +14% synergy
Lizard Blades
15% of 688 decks +12% synergy
Consuming Aberration
14% of 1308 decks +10% synergy
Mind Flayer
14% of 1302 decks +13% synergy
Fear of Impostors
14% of 183 decks +12% synergy
Dread Presence
14% of 2209 decks +12% synergy
Crypt Ghast
14% of 2223 decks +9% synergy
Spark Double
14% of 1305 decks +7% synergy
Phyrexian Obliterator
14% of 2224 decks +12% synergy
Overlord of the Floodpits
14% of 183 decks +10% synergy
Instants
Divine Resilience
60% of 5 decks +56% synergy
Void Rend
31% of 183 decks +16% synergy
Chaos Warp
28% of 698 decks -4% synergy
Path to Exile
26% of 336 decks -20% synergy
Brokers Charm
26% of 93 decks +22% synergy
Endless Detour
25% of 93 decks +23% synergy
Reality Shift
23% of 1308 decks +15% synergy
Terminate
23% of 706 decks +2% synergy
Despark
21% of 330 decks +6% synergy
Heroic Intervention
21% of 180 decks -9% synergy
Negate
21% of 1310 decks -2% synergy
Cyclonic Rift
20% of 1308 decks -7% synergy
Don't Make a Sound
19% of 54 decks +13% synergy
Anguished Unmaking
18% of 333 decks -6% synergy
Suspended Sentence
18% of 134 decks +14% synergy
Deadly Rollick
18% of 2202 decks +7% synergy
Bedevil
17% of 696 decks +3% synergy
Arcane Denial
17% of 1314 decks -2% synergy
Abzan Charm
17% of 122 decks +12% synergy
Resculpt
17% of 1303 decks +12% synergy
Enlightened Tutor
15% of 337 decks -2% synergy
An Offer You Can't Refuse
15% of 1270 decks -6% synergy
Assassin's Trophy
15% of 180 decks -15% synergy
Fierce Guardianship
15% of 1303 decks -3% synergy
Dissipate
15% of 1314 decks +14% synergy
Baleful Mastery
15% of 2197 decks +12% synergy
Vampiric Tutor
14% of 2248 decks -4% synergy
Mana Drain
13% of 1314 decks -2% synergy
Deflecting Swat
13% of 694 decks -4% synergy
Rakdos Charm
12% of 698 decks -2% synergy
Brainstorm
12% of 1314 decks -9% synergy
Utter End
12% of 335 decks +5% synergy
Untimely Malfunction
12% of 58 decks -4% synergy
Ghostly Flicker
12% of 1308 decks +7% synergy
Beast Within
12% of 180 decks -27% synergy
Void Shatter
12% of 1307 decks +11% synergy
Dovin's Veto
12% of 191 decks -7% synergy
Teferi's Protection
11% of 332 decks -8% synergy
Infernal Grasp
11% of 2175 decks +4% synergy
Revitalizing Repast
11% of 36 decks -1% synergy
Consuming Corruption
11% of 541 decks +9% synergy
Reap
11% of 182 decks +11% synergy
Great Train Heist
11% of 338 decks +7% synergy
Gift of the Viper
11% of 28 decks +7% synergy
Mortify
11% of 337 decks -1% synergy
Swan Song
10% of 1308 decks -6% synergy
Fell the Profane
10% of 587 decks -1% synergy
Malakir Rebirth
10% of 2202 decks +1% synergy
Stroke of Midnight
10% of 166 decks -3% synergy
Defile
10% of 2210 decks +6% synergy
Sorceries
Feed the Swarm
30% of 2202 decks +12% synergy
Blasphemous Act
29% of 698 decks -4% synergy
Cultivate
27% of 180 decks -19% synergy
Maddening Cacophony
25% of 1303 decks +23% synergy
Rousing Refrain
24% of 694 decks +22% synergy
Farseek
22% of 180 decks -13% synergy
Demonic Tutor
20% of 2248 decks -2% synergy
Curse of the Swine
20% of 1308 decks +16% synergy
Rampant Growth
20% of 182 decks -15% synergy
Vandalblast
19% of 698 decks +3% synergy
Kodama's Reach
19% of 180 decks -12% synergy
Fractured Sanity
19% of 1302 decks +17% synergy
Nature's Lore
16% of 182 decks -16% synergy
Inspiring Refrain
16% of 1303 decks +15% synergy
Toxic Deluge
15% of 2222 decks -2% synergy
Farewell
15% of 314 decks +2% synergy
Sign in Blood
15% of 2225 decks +5% synergy
Damnation
15% of 2228 decks +7% synergy
Mind Grind
14% of 1308 decks +12% synergy
Eerie Ultimatum
14% of 121 decks +2% synergy
Damn
13% of 324 decks -3% synergy
Windfall
12% of 1314 decks -1% synergy
Reanimate
12% of 2248 decks -4% synergy
Insatiable Avarice
12% of 836 decks +7% synergy
Night's Whisper
11% of 2233 decks +2% synergy
Ravenform
11% of 1303 decks +8% synergy
Supreme Verdict
11% of 192 decks -3% synergy
Read the Bones
11% of 2223 decks +3% synergy
Three Visits
10% of 182 decks -14% synergy
Villainous Wealth
10% of 108 decks +2% synergy
Ancestral Vision
10% of 1311 decks +9% synergy
Jeska's Will
10% of 694 decks -8% synergy
Wrath of God
9% of 337 decks +3% synergy
Diabolic Tutor
9% of 2248 decks +3% synergy
Merciless Eviction
9% of 335 decks +5% synergy
Push // Pull
9% of 33 decks +9% synergy
Profane Tutor
9% of 2193 decks +6% synergy
Vindicate
9% of 337 decks +2% synergy
Revenge of the Rats
8% of 36 decks +4% synergy
Ponder
8% of 1311 decks -5% synergy
Reality Strobe
8% of 1311 decks +8% synergy
Mind Funeral
8% of 1309 decks +7% synergy
Irenicus's Vile Duplication
8% of 1258 decks +4% synergy
Call of the Nightwing
8% of 1308 decks +8% synergy
Exsanguinate
8% of 2224 decks +2% synergy
Nightmare Unmaking
7% of 2208 decks +7% synergy
Essence Harvest
7% of 2223 decks +7% synergy
Final Act
7% of 612 decks +6% synergy
Enter the Enigma
7% of 134 decks -1% synergy
Harmonize
7% of 180 decks -2% synergy
Utility Artifacts
Lightning Greaves
30% of 2234 decks +5% synergy
Whispersilk Cloak
22% of 2233 decks +19% synergy
Stone of Erech
15% of 1583 decks +15% synergy
Jet Medallion
15% of 2248 decks +12% synergy
Winged Boots
15% of 1302 decks +13% synergy
Brotherhood Regalia
13% of 448 decks +9% synergy
Silver Shroud Costume
12% of 980 decks +10% synergy
Panharmonicon
11% of 2218 decks +7% synergy
Mindcrank
11% of 2224 decks +10% synergy
Ring of Valkas
11% of 2223 decks +11% synergy
Soul-Guide Lantern
11% of 2202 decks +10% synergy
Bolas's Citadel
11% of 2211 decks +2% synergy
Lavaspur Boots
11% of 885 decks +8% synergy
Ring of Evos Isle
10% of 2223 decks +10% synergy
Wayfarer's Bauble
10% of 2233 decks +1% synergy
Lantern of the Lost
10% of 2155 decks +10% synergy
Relic of Progenitus
10% of 2226 decks +10% synergy
Trailblazer's Boots
10% of 2225 decks +8% synergy
Ring of Xathrid
9% of 2223 decks +9% synergy
Leyline Axe
9% of 58 decks +3% synergy
Bontu's Monument
8% of 2218 decks +6% synergy
Skullclamp
8% of 2233 decks -4% synergy
Tormod's Crypt
8% of 2248 decks +7% synergy
Shadowspear
7% of 2202 decks +4% synergy
Conduit of Worlds
7% of 122 decks +1% synergy
Mithril Coat
7% of 1596 decks +2% synergy
Venser's Journal
7% of 2224 decks +6% synergy
Caduceus, Staff of Hermes
7% of 42 decks +3% synergy
Embercleave
7% of 694 decks +4% synergy
Darksteel Reactor
7% of 2233 decks +7% synergy
Banner of Kinship
7% of 58 decks -5% synergy
Herald's Horn
6% of 2217 decks +0% synergy
Ashnod's Altar
6% of 2248 decks -1% synergy
Whip of Erebos
6% of 2223 decks +3% synergy
Portal to Phyrexia
5% of 1926 decks +4% synergy
Expedition Map
5% of 2225 decks +2% synergy
Two-Handed Axe
5% of 681 decks +3% synergy
Helm of the Host
5% of 2216 decks +2% synergy
Tamiyo's Journal
5% of 2218 decks +4% synergy
Enchantments
Aqueous Form
31% of 1308 decks +27% synergy
Web of Inertia
28% of 1314 decks +28% synergy
Descent into Avernus
28% of 681 decks +24% synergy
As Foretold
28% of 1307 decks +25% synergy
Leyline of the Guildpact
27% of 26 decks +4% synergy
Court of Locthwain
26% of 1419 decks +25% synergy
Leyline of the Void
26% of 2228 decks +25% synergy
Rhystic Study
24% of 1314 decks -3% synergy
Court of Cunning
23% of 1303 decks +22% synergy
Smothering Tithe
23% of 331 decks -2% synergy
Extravagant Replication
19% of 1270 decks +17% synergy
Court of Ambition
19% of 2201 decks +17% synergy
Ghostly Prison
18% of 337 decks +7% synergy
Propaganda
18% of 1314 decks +6% synergy
Paradox Haze
17% of 1311 decks +16% synergy
Mechanized Production
17% of 1307 decks +14% synergy
Planar Void
16% of 2248 decks +16% synergy
Braid of Fire
16% of 699 decks +15% synergy
Prismatic Omen
15% of 180 decks +14% synergy
Blind Obedience
14% of 335 decks +7% synergy
Land Tax
13% of 337 decks +6% synergy
Compost
13% of 182 decks +12% synergy
Virtue of Persistence
13% of 1460 decks +9% synergy
Sphere of Safety
12% of 335 decks +7% synergy
Goblin Assault
12% of 698 decks +11% synergy
Authority of the Consuls
12% of 333 decks +7% synergy
The Ruinous Powers
12% of 647 decks +10% synergy
Black Market Connections
12% of 2107 decks +1% synergy
Thopter Spy Network
11% of 1308 decks +8% synergy
Aggravated Assault
11% of 705 decks +8% synergy
Rest in Peace
11% of 335 decks +9% synergy
Dramatic Finale
11% of 326 decks +11% synergy
Struggle for Project Purity
11% of 595 decks +8% synergy
Reflections of Littjara
10% of 1303 decks +5% synergy
Black Market
10% of 2248 decks +6% synergy
Palace Siege
10% of 2220 decks +9% synergy
Caretaker's Talent
10% of 30 decks -1% synergy
Honden of Infinite Rage
10% of 700 decks +9% synergy
Call of the Ring
10% of 1644 decks +6% synergy
Kumena's Awakening
10% of 1306 decks +10% synergy
Debtors' Knell
9% of 337 decks +8% synergy
Lunar Convocation
9% of 32 decks +3% synergy
Grave Pact
9% of 2248 decks +5% synergy
Tribute to the World Tree
9% of 119 decks +1% synergy
Karmic Justice
9% of 337 decks +8% synergy
Stolen Strategy
9% of 697 decks +8% synergy
Mystic Remora
9% of 1314 decks -9% synergy
Greater Auramancy
9% of 337 decks +7% synergy
Aether Tunnel
8% of 1305 decks +8% synergy
Grasp of Fate
8% of 334 decks +5% synergy
Planeswalkers
Ashiok, Dream Render
32% of 1305 decks +28% synergy
Ashiok, Nightmare Weaver
19% of 1308 decks +19% synergy
Ashiok, Wicked Manipulator
5% of 1511 decks +5% synergy
Kaya, Orzhov Usurper
5% of 331 decks +5% synergy
Liliana of the Dark Realms
5% of 2223 decks +4% synergy
Utility Lands
Bojuka Bog
46% of 2224 decks +16% synergy
Rogue's Passage
34% of 2223 decks +14% synergy
Reliquary Tower
31% of 2225 decks +2% synergy
Urborg, Tomb of Yawgmoth
28% of 2228 decks +19% synergy
Cabal Coffers
27% of 2248 decks +17% synergy
Shizo, Death's Storehouse
16% of 2231 decks +11% synergy
Scavenger Grounds
14% of 2217 decks +11% synergy
Nykthos, Shrine to Nyx
13% of 2223 decks +8% synergy
Hall of Heliod's Generosity
13% of 330 decks +6% synergy
Cabal Stronghold
12% of 2216 decks +9% synergy
Nephalia Drownyard
11% of 1308 decks +8% synergy
Vault of the Archangel
11% of 335 decks -0% synergy
Arena of Glory
10% of 130 decks +1% synergy
Castle Locthwain
10% of 2206 decks +5% synergy
Otawara, Soaring City
9% of 1275 decks -7% synergy
Three Tree City
9% of 403 decks -0% synergy
The Black Gate
9% of 1557 decks +6% synergy
Boseiju, Who Endures
9% of 171 decks -10% synergy
Temple of the False God
9% of 2245 decks -1% synergy
Minas Morgul, Dark Fortress
8% of 1309 decks +6% synergy
Command Beacon
8% of 2220 decks +4% synergy
Witch's Cottage
8% of 2206 decks +4% synergy
Witch's Clinic
8% of 2197 decks +7% synergy
Takenuma, Abandoned Mire
8% of 2139 decks -3% synergy
Mystic Sanctuary
8% of 1305 decks -4% synergy
Dwarven Hold
8% of 706 decks +8% synergy
Restless Reef
7% of 741 decks +3% synergy
Ancient Tomb
7% of 2248 decks -3% synergy
Mortuary Mire
7% of 2220 decks +2% synergy
Pit of Offerings
6% of 1206 decks +5% synergy
Phyrexian Tower
6% of 2248 decks -3% synergy
Gavony Township
6% of 122 decks -4% synergy
Barren Moor
6% of 2246 decks +2% synergy
Crypt of Agadeem
5% of 2225 decks +4% synergy
War Room
5% of 2201 decks -1% synergy
Mana Artifacts
Sol Ring
84% of 2248 decks -1% synergy
Arcane Signet
71% of 2206 decks -1% synergy
Dimir Signet
44% of 1311 decks +14% synergy
Talisman of Dominance
40% of 1313 decks +8% synergy
Talisman of Creativity
30% of 545 decks +1% synergy
Rakdos Signet
29% of 699 decks -1% synergy
Orzhov Signet
28% of 337 decks +1% synergy
Talisman of Indulgence
28% of 702 decks +1% synergy
Izzet Signet
25% of 547 decks -3% synergy
Thought Vessel
21% of 2220 decks +4% synergy
Fellwar Stone
19% of 2248 decks -2% synergy
Mind Stone
19% of 2248 decks +2% synergy
Azorius Signet
19% of 194 decks -7% synergy
Talisman of Hierarchy
18% of 330 decks -6% synergy
Midnight Clock
17% of 1305 decks +12% synergy
Replicating Ring
17% of 2199 decks +15% synergy
Commander's Sphere
15% of 2221 decks +0% synergy
Talisman of Progress
15% of 194 decks -8% synergy
Patchwork Banner
12% of 372 decks +2% synergy
Charcoal Diamond
11% of 2248 decks +6% synergy
Boros Signet
10% of 130 decks -13% synergy
Relic of Sauron
10% of 475 decks -1% synergy
Golgari Signet
9% of 180 decks -3% synergy
Talisman of Resilience
9% of 180 decks -3% synergy
Chromatic Lantern
8% of 2223 decks -1% synergy
Nyx Lotus
8% of 2202 decks +6% synergy
Throne of Eldraine
6% of 1419 decks +3% synergy
Sol Talisman
5% of 2193 decks +5% synergy
Mana Crypt
5% of 2248 decks -3% synergy
Decanter of Endless Water
5% of 2107 decks +0% synergy
Lands
Command Tower
60% of 2223 decks -14% synergy
Drowned Catacomb
48% of 1309 decks +23% synergy
Watery Grave
48% of 1311 decks +7% synergy
Xander's Lounge
48% of 541 decks +20% synergy
Sunken Hollow
47% of 1308 decks +13% synergy
Blood Crypt
45% of 699 decks +7% synergy
The World Tree
44% of 94 decks +10% synergy
Steam Vents
42% of 547 decks +3% synergy
Overgrown Tomb
41% of 180 decks -2% synergy
Indatha Triome
40% of 121 decks +10% synergy
Dragonskull Summit
39% of 698 decks +8% synergy
Crumbling Necropolis
39% of 546 decks +8% synergy
Shipwreck Marsh
38% of 1299 decks +19% synergy
Zagoth Triome
38% of 108 decks +8% synergy
Morphic Pool
37% of 1305 decks +11% synergy
Raffine's Tower
37% of 183 decks +10% synergy
Godless Shrine
37% of 337 decks -4% synergy
Training Center
35% of 545 decks +8% synergy
Savai Triome
35% of 129 decks +8% synergy
Sulfur Falls
35% of 546 decks +4% synergy
Ziatora's Proving Ground
34% of 105 decks +3% synergy
Luxury Suite
34% of 697 decks +8% synergy
Arcane Sanctum
29% of 194 decks +2% synergy
Smoldering Marsh
29% of 698 decks -4% synergy
Isolated Chapel
29% of 335 decks +1% synergy
Tainted Isle
28% of 1314 decks +17% synergy
Stormcarved Coast
28% of 541 decks +10% synergy
Choked Estuary
27% of 1307 decks +10% synergy
Haunted Ridge
24% of 691 decks +9% synergy
Temple of Deceit
24% of 1308 decks +8% synergy
Dimir Aqueduct
24% of 1311 decks +7% synergy
Temple Garden
23% of 122 decks -17% synergy
Seething Landscape
23% of 96 decks +8% synergy
Caves of Koilos
23% of 337 decks -5% synergy
Hallowed Fountain
23% of 194 decks -18% synergy
Exotic Orchard
23% of 2225 decks -13% synergy
Vault of Champions
22% of 326 decks -3% synergy
Temple of Silence
22% of 335 decks +4% synergy
Underground River
22% of 1314 decks +2% synergy
Path of Ancestry
21% of 2217 decks +0% synergy
Shivan Reef
21% of 550 decks -6% synergy
Sulfurous Springs
21% of 706 decks +0% synergy
Spara's Headquarters
20% of 93 decks -11% synergy
Contaminated Landscape
20% of 25 decks +8% synergy
Woodland Cemetery
20% of 180 decks -8% synergy
Ketria Triome
20% of 95 decks -12% synergy
Myriad Landscape
19% of 2221 decks +0% synergy
Breeding Pool
19% of 108 decks -21% synergy
Sandsteppe Citadel
19% of 122 decks -7% synergy
Underground Mortuary
19% of 64 decks +3% synergy