Dualcaster Mage + Black Sun's Twilight + Yahenni, Undying Partisan

Dualcaster Mage
Black Sun's Twilight
Yahenni, Undying Partisan

Requires
Dualcaster Mage must be in hand. Black Sun's Twilight must be in hand. Yahenni, Undying Partisan must be on the battlefield. Mana needed: 6
Steps
  1. Cast Black Sun's Twilight by paying 5, optionally choosing to target a creature.
  2. Holding priority, cast Dualcaster Mage by paying 1.
  3. When Dualcaster Mage enters the battlefield, it triggers, copying Black Sun's Twilight, optionally choosing to target a creature.
  4. Holding priority, activate Yahenni by sacrificing Dualcaster Mage.
  5. Resolve the copy of Black Sun's Twilight, giving up to one creature -5/-5 until end of turn and returning Dualcaster Mage from your graveyard to the battlefield.
  6. Repeat from step 3.
Results
Infinite LTB. Infinite ETB. Infinite sacrifice triggers. Infinite death triggers. Infinite magecraft triggers. Reduce any number of target creatures' toughness to zero.

Lagomos, Hand of Hatred
0.09% of 1109 decks 1 decks
Chainer, Nightmare Adept
0.03% of 3186 decks 1 decks
Creatures
Servant of the Stinger
100% of 1 decks +97% synergy
Stormclaw Rager
100% of 1 decks +96% synergy
Carrion Feeder
100% of 2 decks +95% synergy
Morbid Opportunist
100% of 2 decks +91% synergy
Viscera Seer
100% of 2 decks +89% synergy
Diamond Lion
50% of 2 decks +50% synergy
Hazoret the Fervent
50% of 2 decks +50% synergy
Scaretiller
50% of 2 decks +50% synergy
Lesser Masticore
50% of 2 decks +50% synergy
Activated Sleeper
50% of 2 decks +50% synergy
Kalitas, Traitor of Ghet
50% of 2 decks +50% synergy
Falkenrath Aristocrat
50% of 2 decks +49% synergy
Avatar of Woe
50% of 2 decks +49% synergy
Sidisi, Undead Vizier
50% of 2 decks +49% synergy
Rose Room Treasurer
50% of 2 decks +49% synergy
Sanitarium Skeleton
50% of 2 decks +49% synergy
Dogged Detective
50% of 2 decks +49% synergy
Clackbridge Troll
50% of 2 decks +49% synergy
Nullpriest of Oblivion
50% of 2 decks +49% synergy
Lord of the Forsaken
50% of 2 decks +49% synergy
Gravelighter
50% of 2 decks +49% synergy
Fell Stinger
50% of 2 decks +49% synergy
Ebondeath, Dracolich
50% of 2 decks +49% synergy
Gravebreaker Lamia
50% of 2 decks +49% synergy
Putrid Goblin
50% of 2 decks +49% synergy
Conspiracy Theorist
50% of 2 decks +48% synergy
Demon's Disciple
50% of 2 decks +48% synergy
Stitcher's Supplier
50% of 2 decks +48% synergy
Yawgmoth, Thran Physician
50% of 2 decks +47% synergy
Harsh Mentor
50% of 2 decks +47% synergy
Burning-Rune Demon
50% of 2 decks +47% synergy
Containment Construct
50% of 2 decks +47% synergy
Surly Badgersaur
50% of 2 decks +47% synergy
Ravenous Chupacabra
50% of 2 decks +47% synergy
Doom Whisperer
50% of 2 decks +47% synergy
Goblin Matron
50% of 2 decks +47% synergy
Xantcha, Sleeper Agent
50% of 2 decks +47% synergy
Sling-Gang Lieutenant
50% of 2 decks +47% synergy
Murderous Redcap
50% of 2 decks +46% synergy
Falkenrath Noble
50% of 2 decks +46% synergy
Meteor Golem
50% of 2 decks +46% synergy
Woe Strider
50% of 2 decks +46% synergy
Orcus, Prince of Undeath
50% of 2 decks +46% synergy
Bone Miser
50% of 2 decks +45% synergy
Squee, Goblin Nabob
50% of 2 decks +45% synergy
Butcher of Malakir
50% of 2 decks +45% synergy
Magus of the Wheel
50% of 2 decks +43% synergy
Plaguecrafter
50% of 2 decks +43% synergy
Garna, Bloodfist of Keld
50% of 2 decks +42% synergy
Syr Konrad, the Grim
50% of 2 decks +42% synergy
Instants
Rowan's Grim Search
100% of 1 decks +97% synergy
Not Dead After All
100% of 1 decks +90% synergy
Demand Answers
100% of 1 decks +82% synergy
Chaos Warp
100% of 2 decks +50% synergy
Shred Memory
50% of 2 decks +49% synergy
First Day of Class
50% of 2 decks +49% synergy
Price of Fame
50% of 2 decks +49% synergy
Mausoleum Secrets
50% of 2 decks +49% synergy
Fake Your Own Death
50% of 2 decks +47% synergy
Hagra Mauling
50% of 2 decks +47% synergy
Soul Shatter
50% of 2 decks +45% synergy
Burnt Offering
50% of 2 decks +45% synergy
Entomb
50% of 2 decks +41% synergy
Malakir Rebirth
50% of 2 decks +35% synergy
Abrade
50% of 2 decks +29% synergy
Deadly Dispute
50% of 2 decks +25% synergy
Dark Ritual
50% of 2 decks +11% synergy
Rakdos Charm
50% of 2 decks +9% synergy
Terminate
50% of 2 decks +7% synergy
Sorceries
Feed the Swarm
100% of 2 decks +52% synergy
Entreat the Dead
50% of 2 decks +50% synergy
Illicit Shipment
50% of 2 decks +49% synergy
Eaten Alive
50% of 2 decks +48% synergy
Reforge the Soul
50% of 2 decks +48% synergy
Infernal Plunge
50% of 2 decks +47% synergy
Deadly Tempest
50% of 2 decks +47% synergy
From Under the Floorboards
50% of 2 decks +47% synergy
Last One Standing
50% of 2 decks +47% synergy
Persist
50% of 2 decks +46% synergy
Agadeem's Awakening
50% of 2 decks +45% synergy
Living Death
50% of 2 decks +45% synergy
Unearth
50% of 2 decks +44% synergy
Diabolic Tutor
50% of 2 decks +43% synergy
Reanimate
50% of 2 decks +31% synergy
Utility Artifacts
Urabrask's Forge
100% of 1 decks +94% synergy
Ashnod's Altar
100% of 2 decks +87% synergy
Moonsilver Key
50% of 2 decks +49% synergy
Crucible of Worlds
50% of 2 decks +49% synergy
Cloud Key
50% of 2 decks +49% synergy
Vedalken Orrery
50% of 2 decks +49% synergy
Idol of Oblivion
50% of 2 decks +47% synergy
Skullclamp
50% of 2 decks +38% synergy
Wayfarer's Bauble
50% of 2 decks +29% synergy
Enchantments
Case of the Stashed Skeleton
100% of 1 decks +99% synergy
Cemetery Tampering
50% of 2 decks +49% synergy
The Cruelty of Gix
50% of 2 decks +49% synergy
Thran Vigil
50% of 2 decks +49% synergy
Dying to Serve
50% of 2 decks +49% synergy
Vampiric Rites
50% of 2 decks +46% synergy
Goblin Bombardment
50% of 2 decks +38% synergy
Impact Tremors
50% of 2 decks +38% synergy
Planeswalkers
Ob Nixilis Reignited
50% of 2 decks +48% synergy
Utility Lands
Dakmor Salvage
50% of 2 decks +49% synergy
Crypt of Agadeem
50% of 2 decks +49% synergy
Arcane Lighthouse
50% of 2 decks +49% synergy
Volrath's Stronghold
50% of 2 decks +49% synergy
Scavenger Grounds
50% of 2 decks +48% synergy
Memorial to Folly
50% of 2 decks +48% synergy
Drownyard Temple
50% of 2 decks +48% synergy
Field of Ruin
50% of 2 decks +48% synergy
Westvale Abbey
50% of 2 decks +48% synergy
Kher Keep
50% of 2 decks +46% synergy
High Market
50% of 2 decks +44% synergy
Geier Reach Sanitarium
50% of 2 decks +42% synergy
Castle Locthwain
50% of 2 decks +40% synergy
Phyrexian Tower
50% of 2 decks +40% synergy
Cabal Coffers
50% of 2 decks +38% synergy
Bojuka Bog
50% of 2 decks +12% synergy
Mana Artifacts
Mind Stone
50% of 2 decks +17% synergy
Talisman of Indulgence
50% of 2 decks -3% synergy
Rakdos Signet
50% of 2 decks -14% synergy
Arcane Signet
50% of 2 decks -32% synergy
Sol Ring
50% of 2 decks -37% synergy
Lands
Foreboding Ruins
100% of 2 decks +55% synergy
Dragonskull Summit
100% of 2 decks +45% synergy
Smoldering Marsh
100% of 2 decks +37% synergy
Command Tower
100% of 2 decks +14% synergy
Crystal Grotto
50% of 2 decks +49% synergy
Riveteers Overlook
50% of 2 decks +47% synergy
Ash Barrens
50% of 2 decks +44% synergy
Sulfurous Mire
50% of 2 decks +43% synergy
Canyon Slough
50% of 2 decks +35% synergy
Myriad Landscape
50% of 2 decks +24% synergy
Bloodstained Mire
50% of 2 decks +22% synergy
Shadowblood Ridge
50% of 2 decks +19% synergy
Haunted Ridge
50% of 2 decks +17% synergy
Tainted Peak
50% of 2 decks +14% synergy
Luxury Suite
50% of 2 decks +8% synergy
Blood Crypt
50% of 2 decks +5% synergy