Phyrexian Altar + Felidar Guardian + Angel of Indemnity

Phyrexian Altar

Felidar Guardian

Angel of Indemnity

How it works

1. Cast Felidar Guardian by paying 3.
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.