Shambling Swarm (Card)
Shambling Swarm
In 614 decks
0% of 2458188 decks
Horobi, Death's Wail
17.45% of 1673 decks
292 decks
Hapatra, Vizier of Poisons
2.72% of 4813 decks
131 decks
The Scorpion God
2.78% of 2162 decks
60 decks
Massacre Girl, Known Killer
0.41% of 3946 decks
16 decks
Maha, Its Feathers Night
0.36% of 2469 decks
9 decks
Mikaeus, the Unhallowed
0.60% of 1337 decks
8 decks
Umbris, Fear Manifest
0.10% of 5729 decks
6 decks
Chainer, Dementia Master
0.30% of 1652 decks
5 decks
Teysa Karlov
0.03% of 15216 decks
5 decks
Omnath, Locus of All
0.04% of 12969 decks
5 decks
Vhati il-Dal
1.11% of 360 decks
4 decks
Toxrill, the Corrosive
0.07% of 5541 decks
4 decks
Yawgmoth, Thran Physician
0.05% of 5567 decks
3 decks
Captain N'ghathrod
0.02% of 12513 decks
3 decks
Burakos, Party Leader // Haunted One
0.31% of 637 decks
2 decks
Ayara, First of Locthwain
0.04% of 4765 decks
2 decks
Taigam, Sidisi's Hand
0.49% of 407 decks
2 decks
Cabal Patriarch
4.76% of 42 decks
2 decks
New Cards
Persistent Constrictor
77% of 13 decks
+68% synergy
Withering Torment
32% of 22 decks
+10% synergy
Nowhere to Run
30% of 47 decks
+28% synergy
Meathook Massacre II
12% of 26 decks
+7% synergy
High Synergy Cards
Obelisk Spider
85% of 155 decks
+83% synergy
Channeler Initiate
75% of 155 decks
+75% synergy
Wickerbough Elder
69% of 157 decks
+69% synergy
Devoted Druid
72% of 157 decks
+69% synergy
Everlasting Torment
69% of 78 decks
+69% synergy
Flourishing Defenses
68% of 157 decks
+67% synergy
Kulrath Knight
62% of 78 decks
+61% synergy
Puncture Blast
60% of 78 decks
+60% synergy
Market Gnome
57% of 7 decks
+57% synergy
Decimator Beetle
57% of 155 decks
+57% synergy
Top Cards
Evolution Sage
62% of 154 decks
+55% synergy
Moldervine Reclamation
58% of 153 decks
+48% synergy
Generous Patron
57% of 154 decks
+57% synergy
Rampant Growth
57% of 158 decks
+22% synergy
Quillspike
57% of 157 decks
+56% synergy
Volt Charge
55% of 78 decks
+55% synergy
Chaos Warp
53% of 78 decks
+20% synergy
Defiant Greatmaw
52% of 155 decks
+52% synergy
Golgari Charm
50% of 157 decks
+45% synergy
Plaguemaw Beast
48% of 157 decks
+48% synergy
Creatures
Poison-Tip Archer
48% of 154 decks
+43% synergy
Furystoke Giant
47% of 78 decks
+47% synergy
Ivy Lane Denizen
46% of 156 decks
+44% synergy
Fynn, the Fangbearer
46% of 137 decks
+45% synergy
Iron Myr
45% of 78 decks
+42% synergy
Tetzimoc, Primal Death
43% of 602 decks
+43% synergy
Mogis's Marauder
42% of 607 decks
+42% synergy
Shadow Alley Denizen
42% of 607 decks
+41% synergy
Harvester of Souls
41% of 608 decks
+38% synergy
Seshiro the Anointed
39% of 157 decks
+38% synergy
Fallen Ferromancer
38% of 78 decks
+38% synergy
Razor Swine
38% of 78 decks
+38% synergy
Zulaport Cutthroat
38% of 607 decks
+28% synergy
Pollenbright Druid
38% of 154 decks
+37% synergy
Falkenrath Noble
38% of 608 decks
+36% synergy
Scuttlemutt
38% of 608 decks
+38% synergy
Stigma Lasher
37% of 78 decks
+37% synergy
Blood Artist
37% of 608 decks
+25% synergy
Syr Konrad, the Grim
36% of 582 decks
+28% synergy
Nefashu
35% of 612 decks
+35% synergy
Fume Spitter
33% of 608 decks
+32% synergy
Orc Sureshot
32% of 607 decks
+32% synergy
Gray Merchant of Asphodel
32% of 607 decks
+23% synergy
Ogre Slumlord
32% of 607 decks
+30% synergy
Sangromancer
32% of 608 decks
+30% synergy
Carnifex Demon
31% of 608 decks
+31% synergy
Consuming Aberration
31% of 32 decks
+27% synergy
Soul Snuffers
31% of 608 decks
+30% synergy
Mahadi, Emporium Master
30% of 56 decks
+24% synergy
Bloom Hulk
30% of 154 decks
+30% synergy
Rathi Trapper
29% of 608 decks
+29% synergy
Sludge Monster
29% of 31 decks
+28% synergy
Cankerbloom
29% of 90 decks
+22% synergy
Midnight Banshee
29% of 608 decks
+28% synergy
Banewhip Punisher
28% of 602 decks
+28% synergy
Kaervek, the Punisher
28% of 121 decks
+27% synergy
Spitting Dilophosaurus
28% of 204 decks
+27% synergy
Exemplar of Strength
28% of 155 decks
+28% synergy
Skinrender
27% of 608 decks
+27% synergy
Gisa, Glorious Resurrector
27% of 533 decks
+25% synergy
Festering Mummy
26% of 606 decks
+26% synergy
Morbid Opportunist
26% of 533 decks
+20% synergy
Caustic Crawler
25% of 608 decks
+25% synergy
Massacre Girl, Known Killer
25% of 173 decks
+23% synergy
Sorceress Queen
25% of 614 decks
+25% synergy
Necroskitter
24% of 608 decks
+23% synergy
Cruel Somnophage
23% of 13 decks
+21% synergy
Captain N'ghathrod
23% of 31 decks
+22% synergy
Serrated Biskelion
22% of 614 decks
+22% synergy
Kothophed, Soul Hoarder
22% of 607 decks
+22% synergy
Instants
Beast Within
48% of 157 decks
+10% synergy
Swords to Plowshares
39% of 18 decks
-24% synergy
Return to Nature
38% of 154 decks
+32% synergy
Aphotic Wisps
37% of 608 decks
+36% synergy
Second Harvest
36% of 156 decks
+31% synergy
Lightning Volley
35% of 78 decks
+35% synergy
Dark Ritual
34% of 614 decks
+12% synergy
Counterspell
33% of 33 decks
-10% synergy
Slice from the Shadows
32% of 146 decks
+31% synergy
Grim Affliction
31% of 608 decks
+31% synergy
Drown in the Loch
29% of 31 decks
+23% synergy
Tragic Slip
29% of 608 decks
+25% synergy
Bedevil
28% of 71 decks
+14% synergy
Heroic Intervention
28% of 156 decks
-2% synergy
Putrefy
26% of 157 decks
+10% synergy
Splendid Agony
26% of 606 decks
+26% synergy
Scar
26% of 78 decks
+26% synergy
Whisper of the Dross
25% of 394 decks
+24% synergy
Path to Exile
24% of 17 decks
-22% synergy
Consuming Corruption
22% of 74 decks
+19% synergy
Subtle Strike
21% of 607 decks
+21% synergy
Defile
21% of 592 decks
+18% synergy
Atomize
21% of 19 decks
+15% synergy
Fracture
20% of 15 decks
+13% synergy
Blood Pact
20% of 533 decks
+18% synergy
Lose Hope
19% of 608 decks
+19% synergy
Terminate
19% of 79 decks
-2% synergy
Sugar Rush
19% of 227 decks
+19% synergy
Touch of Darkness
18% of 614 decks
+18% synergy
Puncture Bolt
17% of 78 decks
+17% synergy
Rakdos Charm
17% of 78 decks
+2% synergy
Wail of the Nim
17% of 608 decks
+16% synergy
Bladebrand
16% of 595 decks
+16% synergy
Wrap in Vigor
16% of 157 decks
+14% synergy
Assassin's Trophy
16% of 154 decks
-15% synergy
Stinging Shot
15% of 155 decks
+15% synergy
Experimental Augury
15% of 20 decks
+12% synergy
Sudden Spoiling
14% of 608 decks
+13% synergy
Hapatra's Mark
14% of 155 decks
+14% synergy
Black Sun's Twilight
13% of 396 decks
+12% synergy
Torment of Venom
13% of 602 decks
+13% synergy
Didn't Say Please
13% of 31 decks
+12% synergy
Resculpt
13% of 31 decks
+8% synergy
Memory Plunder
12% of 32 decks
+10% synergy
Negate
12% of 32 decks
-10% synergy
Succumb to Temptation
12% of 607 decks
+12% synergy
Blur of Blades
12% of 77 decks
+12% synergy
Corrupted Conviction
12% of 320 decks
+6% synergy
Vampiric Tutor
11% of 614 decks
-8% synergy
Disfigure
11% of 608 decks
+11% synergy
Sorceries
Driven // Despair
44% of 155 decks
+43% synergy
Retribution
43% of 79 decks
+43% synergy
Ruinous Ultimatum
38% of 8 decks
+19% synergy
Chandra's Ignition
35% of 78 decks
+30% synergy
Shamanic Revelation
35% of 156 decks
+25% synergy
Courage in Crisis
34% of 154 decks
+33% synergy
Black Sun's Zenith
33% of 608 decks
+32% synergy
Regrowth
32% of 158 decks
+29% synergy
Unnatural Restoration
32% of 90 decks
+28% synergy
Sign in Blood
31% of 608 decks
+22% synergy
Incremental Blight
31% of 608 decks
+31% synergy
Diabolic Tutor
30% of 614 decks
+23% synergy
Feed the Swarm
28% of 574 decks
+10% synergy
Collective Unconscious
27% of 158 decks
+27% synergy
Read the Bones
27% of 607 decks
+19% synergy
Nighthaze
27% of 608 decks
+27% synergy
Thirsting Roots
24% of 90 decks
+22% synergy
Liliana's Influence
24% of 606 decks
+24% synergy
Smell Fear
23% of 126 decks
+22% synergy
Edge of Autumn
22% of 157 decks
+22% synergy
Cultivate
22% of 157 decks
-25% synergy
Lethal Sting
22% of 602 decks
+22% synergy
Kodama's Reach
20% of 157 decks
-12% synergy
Fractured Sanity
19% of 31 decks
+17% synergy
Profane Command
18% of 608 decks
+17% synergy
Spread the Sickness
16% of 608 decks
+16% synergy
Predatory Rampage
16% of 157 decks
+16% synergy
Tezzeret's Gambit
16% of 32 decks
+12% synergy
Beacon of Unrest
15% of 608 decks
+14% synergy
Cannibalize
15% of 614 decks
+15% synergy
Reanimate
15% of 614 decks
-1% synergy
Insatiable Avarice
14% of 121 decks
+9% synergy
Ambition's Cost
13% of 614 decks
+12% synergy
Demonic Tutor
13% of 614 decks
-9% synergy
Rise of the Dark Realms
13% of 607 decks
+10% synergy
Psionic Ritual
13% of 31 decks
+12% synergy
Contentious Plan
13% of 31 decks
+11% synergy
Maddening Cacophony
13% of 31 decks
+11% synergy
Scarscale Ritual
12% of 32 decks
+12% synergy
Night's Whisper
12% of 608 decks
+3% synergy
Ancient Craving
12% of 614 decks
+11% synergy
Carnivorous Canopy
12% of 90 decks
+11% synergy
Traumatize
12% of 33 decks
+11% synergy
Blasphemous Act
12% of 78 decks
-22% synergy
Victimize
11% of 614 decks
-0% synergy
Diabolic Intent
11% of 614 decks
+2% synergy
Drown in Ichor
11% of 394 decks
+8% synergy
Persist
10% of 552 decks
+8% synergy
Mass Diminish
10% of 31 decks
+9% synergy
Tasha's Hideous Laughter
10% of 31 decks
+9% synergy
Utility Artifacts
Tooth of Chiss-Goria
37% of 608 decks
+37% synergy
Scale of Chiss-Goria
37% of 608 decks
+37% synergy
Glaring Spotlight
36% of 607 decks
+35% synergy
Cauldron of Souls
34% of 608 decks
+34% synergy
Squee's Toy
33% of 614 decks
+33% synergy
Bloodthirsty Blade
32% of 583 decks
+31% synergy
Liquimetal Coating
32% of 608 decks
+31% synergy
Distorting Lens
32% of 614 decks
+32% synergy
Contagion Clasp
31% of 608 decks
+30% synergy
Serrated Arrows
22% of 614 decks
+22% synergy
Tower of Coireall
20% of 614 decks
+20% synergy
Baton of Morale
19% of 614 decks
+19% synergy
Skullclamp
18% of 608 decks
+6% synergy
Jet Medallion
17% of 614 decks
+15% synergy
Contagion Engine
16% of 608 decks
+15% synergy
Sacred Armory
16% of 607 decks
+16% synergy
Mimic Vat
16% of 608 decks
+14% synergy
Hylda's Crown of Winter
14% of 234 decks
+14% synergy
Wayfarer's Bauble
13% of 608 decks
+3% synergy
Swiftfoot Boots
13% of 608 decks
-15% synergy
Whispersilk Cloak
13% of 608 decks
+9% synergy
Lightning Greaves
13% of 608 decks
-13% synergy
Staff of Nin
12% of 608 decks
+11% synergy
Jade Monolith
10% of 614 decks
+10% synergy
Shadowspear
9% of 579 decks
+5% synergy
Bontu's Monument
8% of 606 decks
+6% synergy
Veilstone Amulet
8% of 608 decks
+8% synergy
Vat of Rebirth
8% of 364 decks
+6% synergy
Bolas's Citadel
7% of 594 decks
-2% synergy
Ashnod's Altar
7% of 614 decks
-0% synergy
Profane Memento
7% of 607 decks
+6% synergy
Helm of Chatzuk
7% of 614 decks
+6% synergy
Throne of Geth
6% of 608 decks
+6% synergy
Belbe's Armor
6% of 614 decks
+6% synergy
Expedition Map
6% of 608 decks
+3% synergy
Dingus Staff
6% of 614 decks
+6% synergy
Icy Manipulator
5% of 614 decks
+5% synergy
Eldrazi Monument
5% of 608 decks
+4% synergy
Enchantments
Warstorm Surge
38% of 78 decks
+33% synergy
All Will Be One
36% of 42 decks
+33% synergy
Nest of Scarabs
36% of 606 decks
+35% synergy
Cryptolith Rite
34% of 156 decks
+30% synergy
Blowfly Infestation
33% of 608 decks
+33% synergy
Retreat to Hagra
33% of 607 decks
+31% synergy
Deathreap Ritual
32% of 156 decks
+28% synergy
Retribution of the Ancients
32% of 607 decks
+31% synergy
Black Market
27% of 614 decks
+22% synergy
Insidious Roots
26% of 23 decks
+17% synergy
Grave Betrayal
22% of 608 decks
+21% synergy
Crumbling Ashes
21% of 608 decks
+21% synergy
Phyrexian Arena
21% of 614 decks
+6% synergy
Endless Evil
19% of 31 decks
+18% synergy
Fists of the Demigod
19% of 78 decks
+19% synergy
Revel in Riches
18% of 602 decks
+15% synergy
Shadows of the Past
18% of 607 decks
+17% synergy
Inexorable Tide
16% of 32 decks
+13% synergy
Beastmaster Ascension
15% of 157 decks
+10% synergy
Rhystic Study
15% of 33 decks
-13% synergy
Greed
15% of 614 decks
+13% synergy
Warlock Class
15% of 537 decks
+14% synergy
Phyrexian Reclamation
13% of 614 decks
+10% synergy
Court of Cunning
13% of 31 decks
+11% synergy
Psychic Corrosion
13% of 31 decks
+11% synergy
Underworld Dreams
13% of 614 decks
+10% synergy
Gift of Doom
12% of 583 decks
+11% synergy
Glistening Oil
12% of 608 decks
+11% synergy
Animate Dead
12% of 614 decks
+2% synergy
Reconnaissance Mission
10% of 31 decks
+5% synergy
Growing Rites of Itlimoc
10% of 155 decks
+4% synergy
Parallel Lives
10% of 157 decks
+2% synergy
Unspeakable Symbol
9% of 612 decks
+9% synergy
Grave Pact
8% of 614 decks
+4% synergy
Cartouche of Ambition
8% of 606 decks
+8% synergy
Bastion of Remembrance
7% of 579 decks
+1% synergy
The Meathook Massacre
7% of 533 decks
+2% synergy
Oversold Cemetery
7% of 612 decks
+5% synergy
Dictate of Erebos
6% of 607 decks
+3% synergy
Fevered Convulsions
6% of 614 decks
+6% synergy
Palace Siege
6% of 607 decks
+5% synergy
Virtue of Persistence
5% of 239 decks
+2% synergy
Sadistic Obsession
5% of 592 decks
+5% synergy
Evolutionary Leap
5% of 156 decks
+4% synergy
Underworld Connections
5% of 608 decks
+4% synergy
Planeswalkers
Kaya the Inexorable
20% of 15 decks
+18% synergy
Liliana, Death Wielder
12% of 606 decks
+12% synergy
Ashiok, Dream Render
10% of 31 decks
+5% synergy
Ob Nixilis, the Hate-Twisted
8% of 594 decks
+7% synergy
Vraska, Betrayal's Sting
7% of 396 decks
+3% synergy
Liliana of the Dark Realms
7% of 608 decks
+5% synergy
Vraska, Swarm's Eminence
6% of 154 decks
+6% synergy
Liliana, the Last Hope
5% of 607 decks
+5% synergy
Vraska, Golgari Queen
5% of 154 decks
+2% synergy
Utility Lands
Oran-Rief, the Vastwood
44% of 157 decks
+39% synergy
Bojuka Bog
30% of 608 decks
-0% synergy
Desert
28% of 614 decks
+28% synergy
Oasis
24% of 614 decks
+24% synergy
Cabal Coffers
24% of 614 decks
+13% synergy
Grasping Dunes
24% of 606 decks
+23% synergy
Karn's Bastion
22% of 594 decks
+17% synergy
Detection Tower
18% of 596 decks
+17% synergy
Vault of the Archangel
18% of 17 decks
+7% synergy
Urborg, Tomb of Yawgmoth
18% of 608 decks
+8% synergy
Forge of Heroes
17% of 596 decks
+17% synergy
Arcane Lighthouse
17% of 607 decks
+16% synergy
Ifnir Deadlands
15% of 602 decks
+15% synergy
Rogue's Passage
15% of 608 decks
-4% synergy
Reliquary Tower
14% of 608 decks
-15% synergy
Maze of Ith
13% of 614 decks
+11% synergy
Cabal Stronghold
13% of 601 decks
+9% synergy
Mystic Sanctuary
13% of 31 decks
+1% synergy
Shizo, Death's Storehouse
13% of 608 decks
+8% synergy
Mortuary Mire
13% of 607 decks
+8% synergy
Boseiju, Who Endures
12% of 107 decks
-7% synergy
Witch's Cottage
12% of 582 decks
+8% synergy
Nykthos, Shrine to Nyx
10% of 607 decks
+5% synergy
Nephalia Drownyard
9% of 32 decks
+7% synergy
Tranquil Thicket
9% of 157 decks
+5% synergy
Spymaster's Vault
8% of 83 decks
+4% synergy
Urborg
8% of 614 decks
+7% synergy
Barren Moor
8% of 612 decks
+4% synergy
Temple of the False God
7% of 612 decks
-2% synergy
Ice Floe
7% of 614 decks
+7% synergy
War Room
7% of 570 decks
+1% synergy
Castle Locthwain
7% of 582 decks
+1% synergy
Hissing Quagmire
6% of 156 decks
+5% synergy
Tower of the Magistrate
6% of 614 decks
+6% synergy
Phyrexian Tower
6% of 614 decks
-3% synergy
Command Beacon
6% of 607 decks
+1% synergy
Desert of the Indomitable
5% of 155 decks
+4% synergy
Takenuma, Abandoned Mire
5% of 486 decks
-6% synergy
Nesting Grounds
5% of 579 decks
+4% synergy
Mana Artifacts
Sol Ring
70% of 614 decks
-15% synergy
Rakdos Signet
69% of 78 decks
+40% synergy
Golgari Signet
57% of 157 decks
+44% synergy
Talisman of Resilience
50% of 153 decks
+39% synergy
Arcane Signet
50% of 582 decks
-22% synergy
Liquimetal Torque
45% of 552 decks
+42% synergy
Dimir Signet
34% of 32 decks
+5% synergy
Mind Stone
32% of 614 decks
+15% synergy
Charcoal Diamond
31% of 614 decks
+26% synergy
Talisman of Indulgence
26% of 78 decks
-0% synergy
Orzhov Signet
24% of 17 decks
-4% synergy
Talisman of Dominance
22% of 32 decks
-9% synergy
Bounty Board
16% of 92 decks
+16% synergy
Dimir Locket
16% of 31 decks
+15% synergy
Dimir Keyrune
12% of 32 decks
+11% synergy
Fellwar Stone
12% of 614 decks
-9% synergy
Commander's Sphere
12% of 607 decks
-4% synergy
Everflowing Chalice
11% of 608 decks
+6% synergy
Thought Vessel
10% of 607 decks
-7% synergy
Fire Diamond
9% of 79 decks
+3% synergy
Prismatic Lens
9% of 608 decks
+7% synergy
Hedron Archive
9% of 607 decks
+6% synergy
Unstable Obelisk
8% of 607 decks
+8% synergy
Throne of Eldraine
7% of 234 decks
+5% synergy
Sphere of the Suns
6% of 608 decks
+6% synergy
Caged Sun
6% of 608 decks
+3% synergy
Lands
Tainted Wood
58% of 158 decks
+45% synergy
Golgari Rot Farm
57% of 157 decks
+39% synergy
Rakdos Carnarium
53% of 78 decks
+38% synergy
Bloodfell Caves
47% of 78 decks
+41% synergy
Jungle Hollow
44% of 156 decks
+35% synergy
Sunken Hollow
41% of 32 decks
+6% synergy
Caves of Koilos
39% of 18 decks
+11% synergy
Cinder Barrens
38% of 78 decks
+37% synergy
Akoum Refuge
38% of 78 decks
+36% synergy
Sundown Pass
38% of 8 decks
+22% synergy
Savai Triome
38% of 8 decks
+10% synergy
Rakdos Guildgate
37% of 78 decks
+33% synergy
Orzhov Basilica
35% of 17 decks
+19% synergy
Woodland Cemetery
34% of 157 decks
+6% synergy
Foul Orchard
32% of 156 decks
+30% synergy
Overgrown Tomb
32% of 157 decks
-11% synergy
Llanowar Wastes
31% of 158 decks
+5% synergy
Temple of Malady
31% of 156 decks
+15% synergy
Golgari Guildgate
31% of 157 decks
+24% synergy
Urborg Volcano
30% of 79 decks
+30% synergy
Vivid Grove
30% of 157 decks
+29% synergy
Temple of Silence
29% of 17 decks
+11% synergy
Smoldering Marsh
28% of 78 decks
-4% synergy
Drowned Catacomb
28% of 32 decks
+3% synergy
Dragonskull Summit
27% of 78 decks
-4% synergy
Snowfield Sinkhole
27% of 15 decks
+23% synergy
Sunlit Marsh
27% of 15 decks
+22% synergy
Shattered Sanctum
27% of 15 decks
+13% synergy
Haunted Ridge
26% of 62 decks
+10% synergy
Shipwreck Marsh
26% of 31 decks
+7% synergy
Blood Crypt
26% of 78 decks
-13% synergy
Tainted Peak
25% of 79 decks
+15% synergy
Myriad Landscape
25% of 607 decks
+5% synergy
Temple of Deceit
25% of 32 decks
+9% synergy
Dimir Aqueduct
25% of 32 decks
+8% synergy
Darkwater Catacombs
24% of 33 decks
+9% synergy
Command Tower
24% of 608 decks
-50% synergy
Isolated Chapel
24% of 17 decks
-4% synergy
Deathcap Glade
23% of 114 decks
+9% synergy
Contaminated Aquifer
22% of 27 decks
+19% synergy
Tainted Field
22% of 18 decks
+9% synergy
Tainted Isle
21% of 33 decks
+10% synergy
Necroblossom Snarl
21% of 131 decks
+9% synergy
Evolving Wilds
21% of 608 decks
-0% synergy
Temple of Malice
21% of 78 decks
+6% synergy
Foreboding Ruins
21% of 78 decks
+5% synergy
Undergrowth Stadium
20% of 137 decks
-6% synergy
Shineshadow Snarl
20% of 15 decks
+8% synergy
Dismal Backwater
19% of 32 decks
+12% synergy
Choked Estuary
19% of 32 decks
+2% synergy