Cavalier of Dawn + Infinite Reflection + March of the Machines + Sigil of Distinction

Cavalier of Dawn

Infinite Reflection

March of the Machines

Sigil of Distinction

How it works

1. Cast Sigil of Distinction by paying 0.
2. Sigil of Distinction 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 Sigil of Distinction from your graveyard to your hand.
5. Repeat.