Sigarda's Summons, Bishop of Wings, Bloodspore Thrinax, and Phyrexian Altar

Prerequisites

• Sigarda's Summons on the battlefield
• Bishop of Wings on the battlefield
• Bloodspore Thrinax on the battlefield
• Phyrexian Altar on the battlefield
• You control an additional Angel
• Bloodspore Thrinax has at least one +1/+1 counter on it

Steps

1. Activate Phyrexian Altar by sacrificing an Angel, adding one mana of any color
2. Bishop of Wings triggers, creating a 1/1 Spirit creature token
3. The Spirit enters the battlefield with at least one +1/+1 counter and becomes a 4/4 Spirit Angel due to having a +1/+1 counter on it
4. Bishop of Wings triggers, causing you to gain four life
5. Activate Phyrexian Altar by sacrificing the Spirit token, adding one mana of any color
6. Repeat from step 2

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers