Thermopod + Moritte of the FrostInitial Card StateMoritte of the Frost on the battlefield.+ Battlefield State: as a copy of the creature with persist. Thermopod on the battlefield. Persist Creature on the battlefield. StepsActivate Thermopod's last ability by sacrificing Moritte of the Frost, adding
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When Moritte of the Frost dies, it triggers its persist ability, returning itself to the battlefield as a copy of the creature with persist with two +1/+1 counters and one -1/-1 counter on it.
Remove one +1/+1 counter and one -1/-1 counter from Moritte of the Frost as a state-based action.
Repeat.
ResultsInfinite death triggersInfinite ETBInfinite LTBInfinite red manaInfinite sacrifice triggers