Sengir, the Dark Baron + Agatha's Soul Cauldron + Triskelion

Sengir, the Dark Baron
Agatha's Soul Cauldron
Triskelion

Requires
Sengir, the Dark Baron must be on the battlefield. Agatha's Soul Cauldron must be on the battlefield. Triskelion must be in exile (exiled by Agatha's Soul Cauldron). Sengir has at least one +1/+1 counter on it. You have a way to give Sengir deathtouch.
Steps
  1. Give Sengir deathtouch, if needed.
  2. Activate Sengir using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to any creature an opponent controls, and killing it due to Sengir's deathtouch.
  3. When the creature dies, Sengir's first ability triggers, putting two +1/+1 counters on it.
  4. Repeat from step 2 as desired.
Results
Destroy all creatures that enter the battlefield under an opponent's control. Destroy all creatures opponents control.

Mikaeus, the Unhallowed
0.07% of 1365 decks 1 decks
Dina, Soul Steeper
0.01% of 7764 decks 1 decks
New Cards
Ozox, the Clattering King
100% of 1 decks +99% synergy
Vengeful Bloodwitch
100% of 1 decks +98% synergy
Creatures
Ageless Entity
100% of 1 decks +100% synergy
Blood Researcher
100% of 1 decks +100% synergy
Spike Feeder
100% of 1 decks +100% synergy
Kazandu Nectarpot
100% of 1 decks +99% synergy
Jaddi Offshoot
100% of 1 decks +99% synergy
Forsaken Miner
100% of 1 decks +99% synergy
Falkenrath Noble
100% of 2 decks +98% synergy
Essence Warden
100% of 1 decks +97% synergy
Prosperous Innkeeper
100% of 1 decks +97% synergy
Maha, Its Feathers Night
100% of 1 decks +97% synergy
Fauna Shaman
100% of 1 decks +97% synergy
Beledros Witherbloom
100% of 1 decks +96% synergy
Arbor Elf
100% of 1 decks +94% synergy
Warren Soultrader
100% of 1 decks +93% synergy
Marionette Apprentice
100% of 1 decks +93% synergy
Blood Artist
100% of 2 decks +88% synergy
Fyndhorn Elves
100% of 1 decks +87% synergy
Elvish Mystic
100% of 1 decks +82% synergy
Eternal Witness
100% of 1 decks +79% synergy
Pith Driller
50% of 2 decks +50% synergy
Monoskelion
50% of 2 decks +50% synergy
Chainbreaker
50% of 2 decks +50% synergy
Grim Poppet
50% of 2 decks +50% synergy
Tatterkite
50% of 2 decks +50% synergy
Geth, Thane of Contracts
50% of 2 decks +50% synergy
Scion of the Swarm
50% of 2 decks +50% synergy
Workhorse
50% of 2 decks +50% synergy
Mephidross Vampire
50% of 2 decks +50% synergy
Dross Harvester
50% of 2 decks +50% synergy
Lesser Masticore
50% of 2 decks +50% synergy
Cryptic Trilobite
50% of 2 decks +50% synergy
Kaervek, the Spiteful
50% of 2 decks +50% synergy
Mindless Automaton
50% of 2 decks +50% synergy
Author of Shadows
50% of 2 decks +50% synergy
Crystalline Crawler
50% of 2 decks +50% synergy
Haunt of the Dead Marshes
50% of 2 decks +50% synergy
Putrid Goblin
50% of 2 decks +49% synergy
Callous Bloodmage
50% of 2 decks +49% synergy
Epicure of Blood
50% of 2 decks +49% synergy
Defiant Bloodlord
50% of 2 decks +49% synergy
Deathgreeter
50% of 2 decks +49% synergy
Veinwitch Coven
50% of 2 decks +49% synergy
Plague Belcher
50% of 2 decks +49% synergy
Oriq Loremage
50% of 2 decks +49% synergy
Tormod, the Desecrator
50% of 2 decks +49% synergy
Threefold Thunderhulk
50% of 2 decks +49% synergy
Vindictive Vampire
50% of 2 decks +49% synergy
Witch of the Moors
50% of 2 decks +49% synergy
Sidisi, Undead Vizier
50% of 2 decks +48% synergy
Sangromancer
50% of 2 decks +48% synergy
Instants
Early Harvest
100% of 1 decks +100% synergy
Chord of Calling
100% of 1 decks +94% synergy
Archdruid's Charm
100% of 1 decks +93% synergy
Beast Within
100% of 1 decks +61% synergy
Village Rites
50% of 2 decks +40% synergy
Vampiric Tutor
50% of 2 decks +32% synergy
Dark Ritual
50% of 2 decks +28% synergy
Sorceries
Uncage the Menagerie
100% of 1 decks +100% synergy
Regrowth
100% of 1 decks +97% synergy
Sanguine Indulgence
50% of 2 decks +50% synergy
Grim Tutor
50% of 2 decks +45% synergy
Diabolic Tutor
50% of 2 decks +44% synergy
Diabolic Intent
50% of 2 decks +41% synergy
Sign in Blood
50% of 2 decks +40% synergy
Demonic Tutor
50% of 2 decks +28% synergy
Utility Artifacts
Kraken's Eye
50% of 2 decks +50% synergy
Staff of the Wild Magus
50% of 2 decks +50% synergy
Tablet of the Guilds
50% of 2 decks +50% synergy
Staff of the Death Magus
50% of 2 decks +50% synergy
Demon's Horn
50% of 2 decks +50% synergy
Fountain of Renewal
50% of 2 decks +50% synergy
Blasting Station
50% of 2 decks +49% synergy
Nim Deathmantle
50% of 2 decks +49% synergy
Mycosynth Lattice
50% of 2 decks +49% synergy
Krark-Clan Ironworks
50% of 2 decks +49% synergy
Altar of Dementia
50% of 2 decks +47% synergy
Phyrexian Altar
50% of 2 decks +46% synergy
Ashnod's Altar
50% of 2 decks +42% synergy
Enchantments
Druid Class
100% of 1 decks +97% synergy
Moldervine Reclamation
100% of 1 decks +91% synergy
Wild Growth
100% of 1 decks +89% synergy
Dogged Pursuit
50% of 2 decks +50% synergy
Night of Souls' Betrayal
50% of 2 decks +50% synergy
Ill-Gotten Inheritance
50% of 2 decks +50% synergy
Retribution of the Ancients
50% of 2 decks +49% synergy
Heartless Summoning
50% of 2 decks +49% synergy
Exquisite Blood
50% of 2 decks +45% synergy
Sanguine Bond
50% of 2 decks +44% synergy
Bastion of Remembrance
50% of 2 decks +44% synergy
Phyrexian Arena
50% of 2 decks +35% synergy
Utility Lands
Gingerbread Cabin
100% of 1 decks +98% synergy
Radiant Fountain
50% of 2 decks +49% synergy
Witch's Cottage
50% of 2 decks +46% synergy
Mortuary Mire
50% of 2 decks +45% synergy
Cabal Coffers
50% of 2 decks +39% synergy
Mana Artifacts
Sol Ring
100% of 2 decks +16% synergy
Pristine Talisman
50% of 2 decks +49% synergy
Chromatic Orrery
50% of 2 decks +48% synergy
Grim Monolith
50% of 2 decks +48% synergy
Chrome Mox
50% of 2 decks +44% synergy
Lotus Petal
50% of 2 decks +43% synergy
Arcane Signet
50% of 2 decks -22% synergy
Lands
Jungle Hollow
100% of 1 decks +91% synergy
Llanowar Wastes
100% of 1 decks +74% synergy
Woodland Cemetery
100% of 1 decks +72% synergy
Bloodstained Mire
50% of 2 decks +40% synergy
Windswept Heath
50% of 2 decks +39% synergy
Exotic Orchard
50% of 2 decks +14% synergy
Command Tower
50% of 2 decks -24% synergy