Time Sieve + Encroaching Mycosynth + Bishop of Wings + Arcane Adaptation

Time Sieve

Encroaching Mycosynth

Bishop of Wings

Arcane Adaptation

How it works

1. Activate Time Sieve by tapping it and sacrificing five other creatures.
2. When the creatures die as Angels due to Arcane Adaptation, 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 Arcane Adaptation, 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 clever engine transforms the battlefield into a recursive loop of eternal time by fundamentally altering what your creatures are. Encroaching Mycosynth and Arcane Adaptation work in tandem behind the scenes to turn all your permanents into artifacts and every creature you control into an Angel, ensuring that any death or entry triggers your other permanents accordingly. You sacrifice five creatures to Time Sieve to take an extra turn, and as those creatures perish, Bishop of Wings sees them die as Angels to spawn a flurry of 1/1 Spirit tokens. Because Arcane Adaptation also makes those new tokens enter as Angels, Bishop of Wings triggers again to pad your life total, leaving you with enough new bodies to feed back into Time Sieve and lock down the game forever.