Grim Return (Card)

Grim Return
In 5496 decks 0% of 2458188 decks
Jeff Dunn
The Best Instants to Flashback with Toshiro Umezawa
If you like flashing back instants and you love mono-black, this flashback to the latest and greatest spells for Toshiro Umezawa.
Andrew Cummings
May 29, 2020
Ultra Budget Brews - Rankle, Master of Pranks
Time to rankle some opponents with Rankle!
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Toshiro Umezawa
70.22% of 1813 decks 1273 decks
Massacre Girl
21.08% of 1803 decks 380 decks
Arvinox, the Mind Flail
20.37% of 977 decks 199 decks
Kokusho, the Evening Star
21.54% of 817 decks 176 decks
Gonti, Lord of Luxury
11.71% of 1341 decks 157 decks
Piru, the Volatile
5.16% of 1434 decks 74 decks
Tariel, Reckoner of Souls
7.42% of 984 decks 73 decks
Kaalia of the Vast
0.34% of 20195 decks 69 decks
Hidetsugu and Kairi
2.60% of 2579 decks 67 decks
K'rrik, Son of Yawgmoth
0.41% of 13841 decks 57 decks
Horobi, Death's Wail
2.81% of 1673 decks 47 decks
Braids, Arisen Nightmare
0.61% of 7033 decks 43 decks
Ashling, the Extinguisher
38.89% of 108 decks 42 decks
Kardur, Doomscourge
0.83% of 4956 decks 41 decks
Aminatou, the Fateshifter
0.62% of 6300 decks 39 decks
Lim-Dûl the Necromancer
19.57% of 184 decks 36 decks
Ink-Eyes, Servant of Oni
15.70% of 223 decks 35 decks
Meren of Clan Nel Toth
0.23% of 14905 decks 34 decks
New Cards
Withering Torment
67% of 308 decks +45% synergy
Blasphemous Edict
56% of 27 decks +21% synergy
Séance Board
54% of 166 decks +49% synergy
Abyssal Harvester
36% of 11 decks +23% synergy
High Fae Trickster
30% of 10 decks +21% synergy
High Synergy Cards
Defile
34% of 5438 decks +31% synergy
Crypt Ghast
35% of 5495 decks +30% synergy
Thrilling Encore
31% of 5454 decks +30% synergy
Kellan Joins Up
33% of 24 decks +30% synergy
Tragic Slip
33% of 5495 decks +29% synergy
Consuming Corruption
31% of 1062 decks +28% synergy
Dark Ritual
50% of 5495 decks +28% synergy
Jet Medallion
30% of 5496 decks +27% synergy
Cabal Stronghold
30% of 5456 decks +26% synergy
Cabal Coffers
37% of 5495 decks +26% synergy
Top Cards
Cultivate
43% of 612 decks -3% synergy
Feed the Swarm
41% of 5364 decks +23% synergy
Swords to Plowshares
40% of 804 decks -23% synergy
Counterspell
34% of 975 decks -9% synergy
Reanimate
33% of 5495 decks +17% synergy
Solemn Simulacrum
32% of 5496 decks +18% synergy
Mind Stone
32% of 5496 decks +14% synergy
Sign in Blood
31% of 5495 decks +22% synergy
Rampant Growth
31% of 612 decks -4% synergy
Gray Merchant of Asphodel
30% of 5492 decks +21% synergy
Creatures
Sakura-Tribe Elder
30% of 612 decks +11% synergy
Eternal Witness
30% of 612 decks +9% synergy
Gisela, Blade of Goldnight
25% of 411 decks +19% synergy
Ignoble Hierarch
25% of 196 decks -1% synergy
Morbid Opportunist
25% of 5220 decks +19% synergy
Aurelia, the Warleader
22% of 411 decks +15% synergy
Honest Rutstein
22% of 193 decks +13% synergy
Dread Presence
20% of 5436 decks +19% synergy
Burnished Hart
20% of 5493 decks +16% synergy
Sedgemoor Witch
20% of 5297 decks +19% synergy
Accursed Marauder
20% of 901 decks +10% synergy
Blood Artist
19% of 5495 decks +7% synergy
Harvester of Souls
18% of 5495 decks +16% synergy
Massacre Wurm
18% of 5495 decks +14% synergy
Soulherder
18% of 238 decks +13% synergy
Kaervek, the Punisher
18% of 1444 decks +17% synergy
Birds of Paradise
17% of 612 decks -10% synergy
Syr Konrad, the Grim
17% of 5413 decks +8% synergy
Priest of Fell Rites
17% of 765 decks +14% synergy
Sepulchral Primordial
17% of 5495 decks +15% synergy
Karmic Guide
17% of 804 decks +12% synergy
Llanowar Elves
17% of 612 decks -4% synergy
Nirkana Revenant
16% of 5495 decks +15% synergy
Liesa, Forgotten Archangel
16% of 749 decks +12% synergy
Wight of the Reliquary
15% of 142 decks +7% synergy
Aurelia, the Law Above
15% of 131 decks +10% synergy
Plaguecrafter
15% of 5450 decks +10% synergy
Pond Prophet
15% of 20 decks +11% synergy
Chainer, Nightmare Adept
15% of 1117 decks +10% synergy
Elas il-Kor, Sadistic Pilgrim
15% of 653 decks +3% synergy
Ziatora, the Incinerator
15% of 189 decks +9% synergy
The Mindskinner
14% of 35 decks +9% synergy
Insidious Fungus
14% of 35 decks +9% synergy
Mahadi, Emporium Master
14% of 1018 decks +8% synergy
Magus of the Coffers
14% of 5495 decks +13% synergy
Demolisher Spawn
14% of 22 decks +6% synergy
Gisa, Glorious Resurrector
13% of 5220 decks +12% synergy
Kess, Dissident Mage
13% of 294 decks +9% synergy
Miirym, Sentinel Wyrm
13% of 68 decks +7% synergy
Feldon of the Third Path
13% of 1132 decks +10% synergy
Sun Titan
13% of 804 decks +3% synergy
Gravebreaker Lamia
12% of 5394 decks +11% synergy
Anger
12% of 1133 decks +6% synergy
Kaalia, Zenith Seeker
12% of 407 decks +10% synergy
Gluttonous Hellkite
12% of 33 decks +6% synergy
Reclamation Sage
12% of 611 decks +1% synergy
Consuming Aberration
12% of 974 decks +8% synergy
Baleful Strix
12% of 974 decks -1% synergy
Razorkin Needlehead
12% of 75 decks +1% synergy
Viscera Seer
12% of 5495 decks +3% synergy
Instants
Crackling Doom
30% of 411 decks +22% synergy
Terminate
29% of 1132 decks +8% synergy
Infernal Grasp
28% of 5220 decks +21% synergy
Path to Exile
27% of 804 decks -18% synergy
Malakir Rebirth
27% of 5364 decks +19% synergy
Soul Shatter
27% of 5364 decks +24% synergy
Go for the Throat
26% of 5495 decks +19% synergy
Fell the Profane
25% of 1159 decks +13% synergy
Force of Despair
25% of 5438 decks +24% synergy
Sheoldred's Edict
25% of 4002 decks +22% synergy
Chaos Warp
24% of 1133 decks -8% synergy
Assassin's Trophy
24% of 600 decks -6% synergy
Putrefy
24% of 612 decks +8% synergy
Boros Charm
23% of 411 decks -2% synergy
Beast Within
23% of 612 decks -16% synergy
Bitter Triumph
22% of 2123 decks +18% synergy
Mortify
22% of 804 decks +10% synergy
Despark
21% of 792 decks +5% synergy
Blood Pact
21% of 5220 decks +19% synergy
Vona's Hunger
20% of 5456 decks +19% synergy
Malicious Affliction
20% of 5484 decks +20% synergy
Negate
20% of 975 decks -3% synergy
Sudden Spoiling
20% of 5495 decks +18% synergy
Bedevil
19% of 1119 decks +5% synergy
Village Rites
19% of 5376 decks +9% synergy
Rakdos Charm
19% of 1132 decks +5% synergy
Succumb to Temptation
19% of 5469 decks +19% synergy
Liliana's Triumph
18% of 5442 decks +18% synergy
Vampiric Tutor
18% of 5495 decks -0% synergy
Not Dead After All
18% of 2734 decks +14% synergy
Cabal Ritual
18% of 5495 decks +13% synergy
Generous Gift
18% of 792 decks -8% synergy
Supernatural Stamina
18% of 5462 decks +16% synergy
Undying Malice
17% of 5129 decks +15% synergy
Snuff Out
17% of 5495 decks +15% synergy
Brainstorm
17% of 975 decks -4% synergy
Imp's Mischief
17% of 5495 decks +14% synergy
Anguished Unmaking
17% of 801 decks -7% synergy
Void Rend
17% of 183 decks +2% synergy
Revitalizing Repast
17% of 136 decks +4% synergy
Doom Blade
17% of 5495 decks +15% synergy
Hostile Negotiations
16% of 4425 decks +15% synergy
Thrill of Possibility
16% of 1117 decks +6% synergy
Entomb
16% of 5495 decks +8% synergy
Frantic Search
15% of 975 decks +3% synergy
Price of Fame
15% of 5450 decks +14% synergy
Rise of the Dread Marn
15% of 5318 decks +14% synergy
Cremate
15% of 5495 decks +14% synergy
Undying Evil
15% of 5495 decks +14% synergy
Feign Death
15% of 5245 decks +12% synergy
Sorceries
Ruinous Ultimatum
29% of 406 decks +11% synergy
Blasphemous Act
28% of 1133 decks -5% synergy
Kodama's Reach
28% of 612 decks -4% synergy
Faithless Looting
24% of 1133 decks +7% synergy
Eerie Ultimatum
24% of 130 decks +11% synergy
Victimize
23% of 5495 decks +12% synergy
Farseek
23% of 612 decks -11% synergy
Exsanguinate
23% of 5495 decks +17% synergy
Mutilate
22% of 5495 decks +20% synergy
Toxic Deluge
21% of 5491 decks +4% synergy
Read the Bones
21% of 5492 decks +13% synergy
Torment of Hailfire
20% of 5459 decks +15% synergy
Mythos of Snapdax
20% of 406 decks +16% synergy
Nature's Lore
19% of 612 decks -13% synergy
Night's Whisper
19% of 5495 decks +10% synergy
Demonic Tutor
19% of 5495 decks -4% synergy
Damn
19% of 765 decks +2% synergy
Extract from Darkness
18% of 973 decks +16% synergy
Bubbling Muck
18% of 5495 decks +17% synergy
Unburial Rites
17% of 804 decks +15% synergy
Rise of the Witch-king
17% of 363 decks +11% synergy
Rise of the Dark Realms
17% of 5495 decks +14% synergy
Culling Ritual
17% of 582 decks +6% synergy
Damnation
16% of 5495 decks +8% synergy
Vindicate
15% of 804 decks +8% synergy
Diabolic Tutor
15% of 5495 decks +8% synergy
Dread Return
15% of 5495 decks +9% synergy
Vandalblast
14% of 1133 decks -2% synergy
Breach the Multiverse
14% of 3642 decks +10% synergy
Villainous Wealth
14% of 154 decks +6% synergy
Bloodsoaked Insight
13% of 220 decks +9% synergy
Three Visits
12% of 612 decks -12% synergy
Beacon of Unrest
12% of 5495 decks +11% synergy
Farewell
11% of 736 decks -2% synergy
Insatiable Avarice
11% of 1444 decks +6% synergy
Bala Ged Recovery
11% of 586 decks +2% synergy
Austere Command
10% of 804 decks -3% synergy
Ponder
10% of 975 decks -3% synergy
Windfall
10% of 975 decks -3% synergy
Wrath of God
10% of 804 decks +3% synergy
Syphon Mind
9% of 5495 decks +7% synergy
Jeska's Will
9% of 1106 decks -8% synergy
Come Back Wrong
9% of 695 decks +7% synergy
Cruelclaw's Heist
9% of 504 decks +6% synergy
Primevals' Glorious Rebirth
8% of 795 decks +4% synergy
Duneblast
8% of 132 decks +5% synergy
Debt to the Deathless
8% of 804 decks +5% synergy
Cathartic Reunion
8% of 1125 decks +5% synergy
Maddening Cacophony
8% of 954 decks +6% synergy
Merciless Eviction
8% of 804 decks +3% synergy
Utility Artifacts
Wayfarer's Bauble
25% of 5496 decks +15% synergy
Swiftfoot Boots
23% of 5496 decks -4% synergy
Hedge Shredder
20% of 40 decks +12% synergy
Lightning Greaves
19% of 5496 decks -6% synergy
Expedition Map
18% of 5496 decks +15% synergy
Bolas's Citadel
18% of 5442 decks +9% synergy
Primal Amulet
14% of 5459 decks +13% synergy
Ashnod's Altar
12% of 5496 decks +4% synergy
Bontu's Monument
9% of 5463 decks +7% synergy
Mimic Vat
9% of 5496 decks +8% synergy
Aetherflux Reservoir
9% of 5468 decks +5% synergy
Skullclamp
9% of 5496 decks -4% synergy
The Skullspore Nexus
8% of 302 decks +4% synergy
Tarrian's Soulcleaver
7% of 2271 decks +4% synergy
Sensei's Divining Top
6% of 5496 decks +1% synergy
Shadowspear
6% of 5395 decks +2% synergy
Whip of Erebos
6% of 5492 decks +2% synergy
Strionic Resonator
6% of 5496 decks +2% synergy
Genesis Chamber
5% of 5496 decks +5% synergy
Phyrexian Altar
5% of 5496 decks +1% synergy
Conduit of Worlds
5% of 451 decks -1% synergy
Oathkeeper, Takeno's Daisho
5% of 5496 decks +5% synergy
Mindcrank
5% of 5496 decks +3% synergy
Conjurer's Closet
5% of 5496 decks +3% synergy
Enchantments
Phyrexian Arena
26% of 5495 decks +11% synergy
Black Market
25% of 5495 decks +20% synergy
Animate Dead
23% of 5495 decks +14% synergy
Meathook Massacre II
20% of 403 decks +15% synergy
Grave Betrayal
18% of 5495 decks +17% synergy
Revel in Riches
16% of 5458 decks +13% synergy
Smothering Tithe
16% of 792 decks -10% synergy
Blind Obedience
15% of 804 decks +8% synergy
Moldervine Reclamation
15% of 597 decks +5% synergy
Kaya's Ghostform
14% of 5442 decks +10% synergy
Riveteers Ascendancy
14% of 189 decks +9% synergy
Debtors' Knell
14% of 804 decks +12% synergy
Black Market Connections
14% of 4897 decks +3% synergy
Rakdos Joins Up
13% of 308 decks +9% synergy
Rhystic Study
13% of 975 decks -15% synergy
Rhythm of the Wild
12% of 199 decks -11% synergy
Lunar Convocation
12% of 50 decks +4% synergy
Journey to Eternity
12% of 600 decks +8% synergy
Deathreap Ritual
12% of 611 decks +7% synergy
Deadbridge Chant
12% of 612 decks +9% synergy
Virtue of Persistence
11% of 2734 decks +8% synergy
Nowhere to Run
11% of 695 decks +9% synergy
Mirari's Wake
11% of 132 decks -3% synergy
Gift of Immortality
10% of 803 decks +8% synergy
Rooftop Storm
10% of 975 decks +8% synergy
Vraska Joins Up
10% of 184 decks +4% synergy
Insidious Roots
10% of 216 decks +1% synergy
Mystic Remora
9% of 975 decks -9% synergy
Necropotence
9% of 5495 decks +4% synergy
Garruk's Uprising
9% of 590 decks -6% synergy
Sultai Ascendancy
9% of 154 decks +7% synergy
The Meathook Massacre
9% of 5220 decks +4% synergy
Greater Good
8% of 612 decks +4% synergy
Propaganda
8% of 975 decks -3% synergy
The Eldest Reborn
8% of 5456 decks +6% synergy
Phyrexian Reclamation
8% of 5495 decks +4% synergy
Sneak Attack
8% of 1133 decks +5% synergy
Minion's Return
8% of 5394 decks +7% synergy
Ghostly Prison
8% of 804 decks -4% synergy
Temur Ascendancy
8% of 78 decks -7% synergy
Bastion of Remembrance
8% of 5382 decks +1% synergy
Reflections of Littjara
7% of 947 decks +2% synergy
Muster the Departed
7% of 82 decks +5% synergy
Land Tax
7% of 804 decks +0% synergy
In the Darkness Bind Them
7% of 186 decks +1% synergy
Necromancy
7% of 5495 decks +4% synergy
Maestros Ascendancy
7% of 274 decks +6% synergy
Sanguine Bond
7% of 5495 decks +1% synergy
Warstorm Surge
6% of 1133 decks +1% synergy
Spelunking
6% of 295 decks +1% synergy
Planeswalkers
Professor Onyx
19% of 5297 decks +18% synergy
Liliana of the Dark Realms
8% of 5495 decks +7% synergy
Dihada, Binder of Wills
6% of 353 decks +1% synergy
Grist, the Hunger Tide
6% of 578 decks +2% synergy
Utility Lands
Bojuka Bog
38% of 5495 decks +7% synergy
Urborg, Tomb of Yawgmoth
28% of 5496 decks +18% synergy
Reliquary Tower
20% of 5496 decks -10% synergy
War Room
17% of 5340 decks +11% synergy
Castle Locthwain
16% of 5413 decks +10% synergy
Witch's Cottage
16% of 5413 decks +12% synergy
Spymaster's Vault
15% of 1159 decks +11% synergy
Arcane Lighthouse
15% of 5485 decks +13% synergy
Rogue's Passage
15% of 5496 decks -5% synergy
Takenuma, Abandoned Mire
14% of 5078 decks +4% synergy
Shifting Woodland
13% of 136 decks +3% synergy
Barren Moor
12% of 5495 decks +9% synergy
Nykthos, Shrine to Nyx
11% of 5493 decks +6% synergy
Mortuary Mire
11% of 5479 decks +6% synergy
Temple of the False God
11% of 5496 decks +1% synergy
Vault of the Archangel
11% of 804 decks +0% synergy
Grim Backwoods
11% of 612 decks +7% synergy
Kessig Wolf Run
10% of 203 decks -6% synergy
Mystic Sanctuary
10% of 962 decks -2% synergy
Thespian's Stage
10% of 5496 decks +7% synergy
Boseiju, Who Endures
9% of 558 decks -10% synergy
Phyrexian Tower
9% of 5495 decks +0% synergy
Restless Fortress
9% of 343 decks +5% synergy
Detection Tower
8% of 5455 decks +7% synergy
High Market
8% of 5496 decks +5% synergy
Restless Reef
8% of 371 decks +4% synergy
Nephalia Drownyard
7% of 974 decks +5% synergy
Mosswort Bridge
7% of 612 decks -3% synergy
Boseiju, Who Shelters All
7% of 5496 decks +7% synergy
Restless Vents
7% of 468 decks +4% synergy
Slayers' Stronghold
7% of 411 decks +1% synergy
Arena of Glory
7% of 198 decks -3% synergy
Otawara, Soaring City
7% of 904 decks -10% synergy
Desolate Lighthouse
6% of 297 decks +2% synergy
Geier Reach Sanitarium
6% of 5470 decks +3% synergy
Command Beacon
6% of 5478 decks +1% synergy
Ancient Tomb
6% of 5496 decks -5% synergy
Barad-dûr
6% of 3170 decks +3% synergy
Shizo, Death's Storehouse
6% of 5495 decks +1% synergy
Restless Anchorage
5% of 74 decks +2% synergy
Creeping Tar Pit
5% of 974 decks +2% synergy
Mines of Moria
5% of 680 decks +1% synergy
Restless Cottage
5% of 327 decks +0% synergy
Mana Artifacts
Sol Ring
84% of 5496 decks -1% synergy
Arcane Signet
64% of 5414 decks -8% synergy
Rakdos Signet
41% of 1132 decks +11% synergy
Boros Signet
40% of 411 decks +16% synergy
Orzhov Signet
39% of 804 decks +12% synergy
Dimir Signet
38% of 974 decks +8% synergy
Talisman of Dominance
36% of 974 decks +5% synergy
Talisman of Hierarchy
27% of 792 decks +3% synergy
Talisman of Indulgence
27% of 1132 decks +1% synergy
Talisman of Creativity
26% of 292 decks -3% synergy
Talisman of Conviction
25% of 407 decks +2% synergy
Izzet Signet
25% of 297 decks -4% synergy
Charcoal Diamond
22% of 5495 decks +17% synergy
Golgari Signet
19% of 612 decks +7% synergy
Thought Vessel
19% of 5478 decks +2% synergy
Fellwar Stone
18% of 5496 decks -3% synergy
Commander's Sphere
16% of 5485 decks +0% synergy
Relic of Sauron
15% of 186 decks +4% synergy
Talisman of Resilience
13% of 597 decks +1% synergy
Azorius Signet
13% of 239 decks -14% synergy
Throne of Eldraine
11% of 2588 decks +9% synergy
Talisman of Progress
11% of 239 decks -11% synergy
Caged Sun
10% of 5496 decks +8% synergy
Simic Signet
10% of 154 decks -4% synergy
Gruul Signet
10% of 203 decks -2% synergy
Mardu Banner
8% of 411 decks +7% synergy
Sky Diamond
8% of 975 decks +3% synergy
Savai Crystal
7% of 406 decks +6% synergy
Talisman of Curiosity
7% of 151 decks -5% synergy
Everflowing Chalice
7% of 5496 decks +2% synergy
Fire Diamond
7% of 1133 decks +1% synergy
Marble Diamond
6% of 804 decks +2% synergy
Worn Powerstone
6% of 5496 decks +3% synergy
Thran Dynamo
6% of 5496 decks +1% synergy
Obelisk of Grixis
5% of 296 decks +4% synergy
Sceptre of Eternal Glory
5% of 4560 decks +4% synergy
Nyx Lotus
5% of 5395 decks +4% synergy
Lands
Nomad Outpost
47% of 411 decks +19% synergy
Crumbling Necropolis
45% of 296 decks +14% synergy
Sunken Hollow
44% of 972 decks +9% synergy
Xander's Lounge
38% of 274 decks +10% synergy
Smoldering Marsh
37% of 1130 decks +4% synergy
Savage Lands
36% of 203 decks +12% synergy
Dragonskull Summit
35% of 1132 decks +4% synergy
Command Tower
34% of 5496 decks -39% synergy
Caves of Koilos
34% of 804 decks +6% synergy
Myriad Landscape
33% of 5485 decks +14% synergy
Drowned Catacomb
32% of 974 decks +6% synergy
Sandsteppe Citadel
32% of 132 decks +6% synergy
Shattered Landscape
31% of 51 decks +18% synergy
Twisted Landscape
31% of 42 decks +10% synergy
Overgrown Tomb
30% of 612 decks -12% synergy
Llanowar Wastes
30% of 612 decks +4% synergy
Savai Triome
30% of 406 decks +3% synergy
Watery Grave
30% of 974 decks -11% synergy
Dimir Aqueduct
30% of 974 decks +13% synergy
Stomping Ground
30% of 203 decks -12% synergy
Godless Shrine
29% of 804 decks -11% synergy
Arcane Sanctum
29% of 239 decks +2% synergy
Isolated Chapel
29% of 804 decks +2% synergy
Opulent Palace
29% of 154 decks +3% synergy
Ziatora's Proving Ground
29% of 189 decks -3% synergy
Woodland Cemetery
29% of 612 decks +1% synergy
Blazemire Verge
28% of 67 decks +6% synergy
Choked Estuary
28% of 971 decks +12% synergy
Blood Crypt
28% of 1132 decks -11% synergy
Orzhov Basilica
28% of 804 decks +12% synergy
Golgari Rot Farm
27% of 612 decks +10% synergy
The World Tree
27% of 73 decks -6% synergy
Steam Vents
27% of 297 decks -12% synergy
Temple of Deceit
27% of 973 decks +10% synergy
Battlefield Forge
27% of 411 decks +1% synergy
Rakdos Carnarium
26% of 1132 decks +11% synergy
Temple of Silence
25% of 803 decks +7% synergy
Darkwater Catacombs
25% of 974 decks +10% synergy
Indatha Triome
25% of 130 decks -7% synergy
Clifftop Retreat
24% of 411 decks -4% synergy
Raffine's Tower
24% of 183 decks -4% synergy
Sulfur Falls
24% of 297 decks -6% synergy
Zagoth Triome
23% of 149 decks -7% synergy
Cinder Glade
23% of 201 decks -15% synergy
Sacred Foundry
23% of 411 decks -13% synergy
Temple of Malady
23% of 611 decks +7% synergy
Shipwreck Marsh
22% of 926 decks +3% synergy
Foreboding Ruins
22% of 1128 decks +6% synergy
Sulfurous Springs
22% of 1132 decks +1% synergy
Boros Garrison
21% of 411 decks +6% synergy