Time Sieve + Mycosynth Lattice + Bishop of Wings + Maskwood Nexus

Time Sieve

Mycosynth Lattice

Bishop of Wings

Maskwood Nexus

How it works

1. Activate Time Sieve by tapping it and sacrificing five other creatures.
2. When the creatures die as Angels due to Maskwood Nexus, Bishop of Wings' second ability triggers five times.
3. Resolve the first trigger, causing you to create a 1/1 Spirit creature token.
4. When the Spirit enters the battlefield as an Angel due to Maskwood Nexus, Bishop of Wings' first ability triggers, causing you to gain 4 life.
5. Repeat from step 3 for each remaining trigger.
6. Resolve the Time Sieve ability from step 1, causing you to take an extra turn after this one.
7. Repeat each turn.

This engine achieves infinite turns by turning your entire board into fuel for Time Sieve. The secret sauce is Mycosynth Lattice making every permanent—including your creatures—an artifact, allowing Time Sieve to sacrifice them directly, while Maskwood Nexus steps in to ensure every creature you control is also an Angel. This tribal transformation means that when those five creatures are sacrificed, Bishop of Wings triggers to replace them with 1/1 Spirit tokens that immediately count as Angels, netting you massive life and a fresh batch of tokens to feed right back into Time Sieve on your next extra turn.