Myr Propagator + Umbral Mantle + Krark-Clan Ironworks + Biomancer's Familiar
Myr Propagator
Umbral Mantle
Krark-Clan Ironworks
Biomancer's Familiar
Requires
Myr Propagator must be on the battlefield.
Umbral Mantle must be on the battlefield.
Krark-Clan Ironworks must be on the battlefield.
Biomancer's Familiar 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 Krark-Clan Ironworks 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.
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