Angel of Indemnity, Phyrexian Altar, and Felidar Guardian

Prerequisites

• Angel of Indemnity on the battlefield
• Phyrexian Altar on the battlefield
• Felidar Guardian in hand
• undefined available

Steps

1. Cast Felidar Guardian by paying
2. When Felidar Guardian enters the battlefield, it triggers, targeting Angel of Indemnity
3. Holding priority, activate Phyrexian Altar by sacrificing Felidar Guardian, adding one mana of any color
4. Resolve the Felidar Guardian ability, blinking Angel of Indemnity
5. When Angel of Indemnity enters the battlefield, it triggers, returning Felidar Guardian from your graveyard to the battlefield
6. Repeat from step 2

Results

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