Time Sieve + Encroaching Mycosynth + Rotlung Reanimator + Arcane Adaptation

Time Sieve

Encroaching Mycosynth

Rotlung Reanimator

Arcane Adaptation

How it works

1. Activate Time Sieve by tapping it and sacrificing five other creatures.
2. When the creatures die as Clerics due to Arcane Adaptation, Rotlung Reanimator triggers five times, creating five 2/2 Zombie creature tokens.
3. Resolve the Time Sieve ability, causing you to take an extra turn after this one.
4. Repeat each turn.

This cunning loop bends the rules of creature types and artifact status to achieve infinite turns. Encroaching Mycosynth turns all your nonland permanents into artifacts, which allows you to feed them directly into Time Sieve's activation cost. Meanwhile, Arcane Adaptation designates every creature you control as a Cleric, ensuring that whenever those creatures are sacrificed, Rotlung Reanimator triggers to replace your lost forces with five fresh 2/2 Zombie tokens. You simply sacrifice those Zombies to take an extra turn with Time Sieve, netting a fresh crop of bodies every turn to keep the engine running indefinitely.