Umbris, Fear Manifest + Opposition Agent + Hive Mind + Mana Severance + Chainer, Dementia Master
Umbris, Fear Manifest
Opposition Agent
Hive Mind
Mana Severance
Chainer, Dementia Master
Requires
Mana Severance in hand. All permanents on the battlefield. Your life total is greater than three times the number of opponents you have. You have at least a number of creature cards in your graveyard equal to the number of opponents you have. 
available plus an additional 
for each opponent you have.
available plus an additional for each opponent you have.Steps
- Cast Mana Severance by paying
- Hive Mind triggers, causing each opponent to copy Mana Severance
- Resolve each opponent's Mana Severance, searching for and exiling all land cards from their libraries
- Resolve your Mana Severance, choosing not to exile any land cards from your library
- Activate Chainer by paying and three life, returning a creature card from your graveyard to the battlefield as a black Nightmare in addition to its other creature types
- That creature enters the battlefield, triggering Umbris
- Resolve the Umbris trigger, revealing no lands from an opponent library, exiling their library
- Repeat from step 5 for each opponent
Results
Exile each opponent's library. Near-infinitely large Umbris.
Top Commanders (1)
Umbris, Fear Manifest
0.09% of 5698 decks
5 decks
Top Cards (3)
Helm of Obedience
80% of 5 decks
+80% synergy
Leyline of the Void
80% of 5 decks
+76% synergy
Tasha's Hideous Laughter
80% of 5 decks
+72% synergy
Creatures (50)
Intellect Devourer
100% of 1 decks
+94% synergy
Elder Brain
100% of 1 decks
+90% synergy
Aboleth Spawn
100% of 1 decks
+88% synergy
Brainstealer Dragon
100% of 1 decks
+88% synergy
Hullbreaker Horror
100% of 3 decks
+83% synergy
Deadeye Navigator
60% of 5 decks
+58% synergy
Thing in the Ice
60% of 5 decks
+56% synergy
Sire of Stagnation
60% of 5 decks
+54% synergy
Spellskite
60% of 5 decks
+52% synergy
Spark Double
60% of 5 decks
+50% synergy
Grazilaxx, Illithid Scholar
60% of 5 decks
+45% synergy
Toxrill, the Corrosive
50% of 4 decks
+41% synergy
Circu, Dimir Lobotomist
40% of 5 decks
+39% synergy
Fathom Feeder
40% of 5 decks
+39% synergy
K'rrik, Son of Yawgmoth
40% of 5 decks
+39% synergy
Falthis, Shadowcat Familiar
40% of 5 decks
+38% synergy
Oblivion Sower
40% of 5 decks
+38% synergy
Yarok's Fenlurker
40% of 5 decks
+38% synergy
Peregrine Drake
40% of 5 decks
+38% synergy
Phyrexian Rager
40% of 5 decks
+36% synergy
Bruvac the Grandiloquent
40% of 5 decks
+34% synergy
Duskmantle Guildmage
40% of 5 decks
+34% synergy
Chasm Skulker
40% of 5 decks
+34% synergy
Thassa's Oracle
40% of 5 decks
+30% synergy
Ravenous Chupacabra
40% of 5 decks
+30% synergy
Nemesis of Reason
40% of 5 decks
+29% synergy
Sludge Monster
40% of 5 decks
+29% synergy
Solemn Simulacrum
40% of 5 decks
+25% synergy
Dauthi Voidwalker
40% of 5 decks
+21% synergy
Overcharged Amalgam
33% of 3 decks
+22% synergy
Blood Celebrant
20% of 5 decks
+20% synergy
Wormfang Drake
20% of 5 decks
+20% synergy
Thopter Assembly
20% of 5 decks
+20% synergy
Palinchron
20% of 5 decks
+20% synergy
Great Whale
20% of 5 decks
+20% synergy
Fleshwrither
20% of 5 decks
+19% synergy
Faceless Butcher
20% of 5 decks
+19% synergy
Grimdancer
20% of 5 decks
+19% synergy
Necrotic Ooze
20% of 5 decks
+19% synergy
Banehound
20% of 5 decks
+19% synergy
Ulamog, the Ceaseless Hunger
20% of 5 decks
+19% synergy
Doom Whisperer
20% of 5 decks
+19% synergy
Razaketh, the Foulblooded
20% of 5 decks
+19% synergy
Eater of the Dead
20% of 5 decks
+18% synergy
Dread Presence
20% of 5 decks
+18% synergy
Crypt Ghast
20% of 5 decks
+18% synergy
Stunt Double
20% of 5 decks
+17% synergy
Thassa, Deep-Dwelling
20% of 5 decks
+17% synergy
Phenax, God of Deception
20% of 5 decks
+17% synergy
Viscera Seer
20% of 5 decks
+16% synergy
Instants (30)
Ghostly Flicker
60% of 5 decks
+56% synergy
Reality Shift
60% of 5 decks
+44% synergy
Mana Drain
60% of 5 decks
+43% synergy
Cyclonic Rift
60% of 5 decks
+30% synergy
Void Shatter
40% of 5 decks
+39% synergy
Dissipate
40% of 5 decks
+38% synergy
Baleful Mastery
40% of 5 decks
+33% synergy
Demonic Consultation
40% of 5 decks
+32% synergy
Mystical Tutor
40% of 5 decks
+23% synergy
Vampiric Tutor
40% of 5 decks
+19% synergy
Dark Ritual
40% of 5 decks
+11% synergy
Eat to Extinction
20% of 5 decks
+19% synergy
Spoils of Blood
20% of 5 decks
+19% synergy
Szat's Will
20% of 5 decks
+19% synergy
Blue Sun's Zenith
20% of 5 decks
+19% synergy
Culling the Weak
20% of 5 decks
+18% synergy
Sudden Spoiling
20% of 5 decks
+17% synergy
Perplex
20% of 5 decks
+16% synergy
Tainted Pact
20% of 5 decks
+15% synergy
Dramatic Reversal
20% of 5 decks
+15% synergy
Didn't Say Please
20% of 5 decks
+13% synergy
Drown in Dreams
20% of 5 decks
+12% synergy
Countersquall
20% of 5 decks
+12% synergy
Deadly Rollick
20% of 5 decks
+4% synergy
Swan Song
20% of 5 decks
+2% synergy
Infernal Grasp
20% of 5 decks
-0% synergy
Arcane Denial
20% of 5 decks
-3% synergy
Drown in the Loch
20% of 5 decks
-5% synergy
Negate
20% of 5 decks
-13% synergy
Counterspell
20% of 5 decks
-36% synergy
Sorceries (27)
Demonic Tutor
80% of 5 decks
+55% synergy
Mind Grind
60% of 5 decks
+52% synergy
Maddening Cacophony
60% of 5 decks
+46% synergy
Sadistic Sacrament
40% of 5 decks
+39% synergy
Extinction Event
40% of 5 decks
+39% synergy
Doomsday
40% of 5 decks
+38% synergy
Ravenform
40% of 5 decks
+34% synergy
Fractured Sanity
40% of 5 decks
+26% synergy
Windfall
40% of 5 decks
+23% synergy
Reanimate
40% of 5 decks
+22% synergy
Ponder
40% of 5 decks
+21% synergy
Feed the Swarm
40% of 5 decks
-4% synergy
Selective Memory
20% of 5 decks
+20% synergy
Rite of Consumption
20% of 5 decks
+20% synergy
Temporal Manipulation
20% of 5 decks
+19% synergy
Nightmare Unmaking
20% of 5 decks
+18% synergy
Time Warp
20% of 5 decks
+18% synergy
Mind Funeral
20% of 5 decks
+16% synergy
Curse of the Swine
20% of 5 decks
+16% synergy
Traumatize
20% of 5 decks
+14% synergy
Grim Tutor
20% of 5 decks
+14% synergy
Mnemonic Betrayal
20% of 5 decks
+14% synergy
Read the Bones
20% of 5 decks
+14% synergy
Buried Alive
20% of 5 decks
+14% synergy
Diabolic Tutor
20% of 5 decks
+11% synergy
Preordain
20% of 5 decks
+7% synergy
Toxic Deluge
20% of 5 decks
-1% synergy
Utility Artifacts (26)
Lightning Greaves
60% of 5 decks
+31% synergy
Blade of Selves
40% of 5 decks
+38% synergy
Soul-Guide Lantern
40% of 5 decks
+38% synergy
Maskwood Nexus
40% of 5 decks
+34% synergy
Bolas's Citadel
40% of 5 decks
+33% synergy
Whispersilk Cloak
40% of 5 decks
+32% synergy
Sensei's Divining Top
40% of 5 decks
+29% synergy
Mindcrank
40% of 5 decks
+23% synergy
Swiftfoot Boots
40% of 5 decks
+15% synergy
Lantern of the Lost
33% of 3 decks
+32% synergy
Goblin Charbelcher
20% of 5 decks
+20% synergy
Jester's Cap
20% of 5 decks
+20% synergy
Crucible of Worlds
20% of 5 decks
+19% synergy
Kormus Bell
20% of 5 decks
+19% synergy
Aetherflux Reservoir
20% of 5 decks
+19% synergy
Trailblazer's Boots
20% of 5 decks
+19% synergy
Time Sieve
20% of 5 decks
+19% synergy
Rings of Brighthearth
20% of 5 decks
+19% synergy
Relic of Progenitus
20% of 5 decks
+18% synergy
Conjurer's Closet
20% of 5 decks
+18% synergy
Sword of Hearth and Home
20% of 5 decks
+18% synergy
Whip of Erebos
20% of 5 decks
+17% synergy
Expedition Map
20% of 5 decks
+16% synergy
Panharmonicon
20% of 5 decks
+16% synergy
Isochron Scepter
20% of 5 decks
+16% synergy
Mesmeric Orb
20% of 5 decks
+14% synergy
Enchantments (21)
Web of Inertia
60% of 5 decks
+59% synergy
Planar Void
60% of 5 decks
+58% synergy
Aqueous Form
60% of 5 decks
+52% synergy
Rhystic Study
60% of 5 decks
+32% synergy
Gravestorm
40% of 5 decks
+40% synergy
Propaganda
40% of 5 decks
+28% synergy
Shared Fate
20% of 5 decks
+20% synergy
Sanguine Bond
20% of 5 decks
+20% synergy
Exquisite Blood
20% of 5 decks
+19% synergy
Dance of the Dead
20% of 5 decks
+19% synergy
Revel in Riches
20% of 5 decks
+18% synergy
Imprisoned in the Moon
20% of 5 decks
+17% synergy
Cunning Rhetoric
20% of 5 decks
+16% synergy
Necropotence
20% of 5 decks
+16% synergy
Bloodchief Ascension
20% of 5 decks
+15% synergy
The Meathook Massacre
20% of 5 decks
+14% synergy
Black Market
20% of 5 decks
+13% synergy
Rogue Class
20% of 5 decks
+12% synergy
Animate Dead
20% of 5 decks
+9% synergy
Reflections of Littjara
20% of 5 decks
+7% synergy
Mystic Remora
20% of 5 decks
+4% synergy
Planeswalkers (3)
Ashiok, Nightmare Muse
60% of 5 decks
+54% synergy
Ashiok, Dream Render
60% of 5 decks
+49% synergy
Ashiok, Nightmare Weaver
20% of 5 decks
+17% synergy
Utility Lands (12)
Urborg, Tomb of Yawgmoth
80% of 5 decks
+56% synergy
Bojuka Bog
80% of 5 decks
+39% synergy
Otawara, Soaring City
50% of 2 decks
+28% synergy
Castle Locthwain
40% of 5 decks
+33% synergy
Castle Vantress
40% of 5 decks
+33% synergy
Cabal Coffers
40% of 5 decks
+26% synergy
Leechridden Swamp
20% of 5 decks
+20% synergy
Scavenger Grounds
20% of 5 decks
+16% synergy
Shizo, Death's Storehouse
20% of 5 decks
+11% synergy
Ancient Tomb
20% of 5 decks
+10% synergy
Mystic Sanctuary
20% of 5 decks
+2% synergy
Rogue's Passage
20% of 5 decks
-8% synergy
Mana Artifacts (17)
Sol Ring
100% of 5 decks
+11% synergy
Dimir Signet
60% of 5 decks
-5% synergy
Arcane Signet
60% of 5 decks
-24% synergy
Fellwar Stone
40% of 5 decks
+9% synergy
Talisman of Dominance
40% of 5 decks
-18% synergy
Honored Heirloom
33% of 3 decks
+33% synergy
Basalt Monolith
20% of 5 decks
+19% synergy
Skyclave Relic
20% of 5 decks
+18% synergy
Worn Powerstone
20% of 5 decks
+16% synergy
Thran Dynamo
20% of 5 decks
+14% synergy
Jeweled Lotus
20% of 5 decks
+13% synergy
Dimir Keyrune
20% of 5 decks
+12% synergy
Mana Crypt
20% of 5 decks
+8% synergy
Sky Diamond
20% of 5 decks
+6% synergy
Commander's Sphere
20% of 5 decks
-5% synergy
Thought Vessel
20% of 5 decks
-8% synergy
Mind Stone
20% of 5 decks
-15% synergy
Lands (18)
Shipwreck Marsh
80% of 5 decks
+39% synergy
Drowned Catacomb
80% of 5 decks
+36% synergy
Watery Grave
80% of 5 decks
+34% synergy
Sunken Hollow
80% of 5 decks
+13% synergy
Command Tower
80% of 5 decks
-8% synergy
Tainted Isle
60% of 5 decks
+20% synergy
Choked Estuary
60% of 5 decks
+14% synergy
Myriad Landscape
40% of 5 decks
+10% synergy
Clearwater Pathway
40% of 5 decks
+10% synergy
Underground River
40% of 5 decks
+8% synergy
Morphic Pool
40% of 5 decks
+3% synergy
Temple of Deceit
40% of 5 decks
-1% synergy
Gemstone Caverns
20% of 5 decks
+15% synergy
Fabled Passage
20% of 5 decks
+10% synergy
Underground Sea
20% of 5 decks
+8% synergy
Terramorphic Expanse
20% of 5 decks
+7% synergy
Path of Ancestry
20% of 5 decks
-8% synergy
Darkwater Catacombs
20% of 5 decks
-19% synergy