Felidar Guardian + Reveillark + Ashnod's Altar

Prerequisites

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Steps

1. 1Cast Felidar Guardian by paying .
2. 2When Felidar Guardian enters the battlefield, it triggers, targeting Reveillark.
3. 3Holding priority, activate Ashnod's Altar by sacrificing Felidar Guardian.
4. 4Resolve the Felidar Guardian trigger, blinking Reveillark.
5. 5When Reveillark leaves the battlefield, it triggers, returning Felidar Guardian and up to one other creature with power 2 or less from your graveyard to the battlefield.
6. 6Repeat from step 2.

Effects

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite recursion of creature cards with power 2 or less
• Infinite sacrifice triggers