Myr Propagator + Umbral Mantle + Ashnod's Altar + Biomancer's Familiar
Myr Propagator
Umbral Mantle
Ashnod's Altar
Biomancer's Familiar
Requires
Myr Propagator must be on the battlefield.
Umbral Mantle must be on the battlefield.
Ashnod's Altar 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 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.
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