Myr Propagator + Umbral Mantle + Ashnod's Altar + Training Grounds
Myr Propagator
Umbral Mantle
Ashnod's Altar
Training Grounds
Requires
Myr Propagator must be on the battlefield.
Umbral Mantle must be on the battlefield.
Ashnod's Altar must be on the battlefield.
Training Grounds must be on the battlefield.
Umbral Mantle attached to Myr Propagator.
Myr Propagator does not have summoning sickness.
Mana needed: 
Steps
- Activate Myr Propagator by paying and tapping it, creating a token copy of itself.
- Activate Ashnod's Altar by sacrificing the Myr Propagator token, adding .
- Activate Myr Propagator by paying and untapping it, giving itself +2/+2 until end of turn.
- Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinitely large Myr Propagator until end of turn. Infinite sacrifice triggers.
Idris, Soul of the TARDIS
1.41% of 71 decks
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0.05% of 1852 decks
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Creatures
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+100% synergy
Order of Whiteclay
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Undercity Scrounger
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+100% synergy
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Meria, Scholar of Antiquity
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Raggadragga, Goreguts Boss
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Ant Queen
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Prize Pig
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Marneus Calgar
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Eldrazi Displacer
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Agatha of the Vile Cauldron
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Thrasios, Triton Hero
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Biomancer's Familiar
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+97% synergy
Zirda, the Dawnwaker
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Galadriel, Light of Valinor
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Emiel the Blessed
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Kenrith, the Returned King
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Likeness Looter
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Carrion Feeder
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Syr Konrad, the Grim
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+91% synergy
Zacama, Primal Calamity
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Mondrak, Glory Dominus
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Birds of Paradise
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Farmstead Gleaner
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+50% synergy
Hateflayer
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+50% synergy
Pia and Kiran Nalaar
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Realm-Scorcher Hellkite
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Mycosynth Golem
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Drafna, Founder of Lat-Nam
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Unctus, Grand Metatect
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Combustible Gearhulk
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Thought Monitor
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Enthusiastic Mechanaut
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Foundry Inspector
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Etherium Sculptor
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Solemn Simulacrum
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Instants
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Clever Concealment
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Teferi's Protection
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Heroic Intervention
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Whir of Invention
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Fierce Guardianship
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Arcane Denial
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Sorceries
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+75% synergy
Kodama's Reach
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Nature's Lore
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Farseek
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Echo Storm
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Flood of Tears
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Crackle with Power
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Fabricate
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Blasphemous Act
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Utility Artifacts
Heartstone
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+99% synergy
Lightning Greaves
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Myr Matrix
50% of 2 decks
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Decoction Module
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Retrofitter Foundry
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Rotating Fireplace
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Aetherworks Marvel
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Gonti's Aether Heart
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Mirrorworks
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Lands
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