Cavalier of Dawn + Infinite Reflection + Phyrexian Marauder

Cavalier of Dawn

Infinite Reflection

Phyrexian Marauder

How it works

1. Cast Phyrexian Marauder by paying 0.
2. Phyrexian Marauder enters the battlefield as a copy of Cavalier of Dawn.
3. Copy of Cavalier of Dawn enter-the-battlefield ability triggers, destroying itself and creating you a 3/3 Golem token.
4. Copy of Cavalier of Dawn dies, triggering itself, returning Phyrexian Marauder from your graveyard to your hand.
5. Repeat.