Sigarda's Summons + Bishop of Wings + Cathars' Crusade + Thermopod

Sigarda's Summons
Bishop of Wings
Cathars' Crusade
Thermopod

Requires
Sigarda's Summons must be on the battlefield. Bishop of Wings must be on the battlefield. Cathars' Crusade must be on the battlefield. Thermopod must be on the battlefield. You control an additional Angel.
Steps
  1. Activate Thermopod's second ability by sacrificing an Angel, adding .
  2. Bishop of Wings triggers, creating a 1/1 Spirit creature token.
  3. The Spirit enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  4. The Spirit token becomes a 4/4 Spirit Angel due to having a +1/+1 counter on it.
  5. Activate Phyrexian Altar by sacrificing the Spirit token, adding .
  6. Repeat from step 2.
Results
Infinite +1/+1 counters. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite red mana. Infinite sacrifice triggers.

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