Sigil of the New Dawn + Pitiless Plunderer + Phyrexian Altar + Ornithopter

Sigil of the New Dawn

Pitiless Plunderer

Phyrexian Altar

Ornithopter

How it works

1. Activate Phyrexian Altar by sacrificing Ornithopter, adding 1.
2. When Ornithopter dies, Sigil of the New Dawn and Pitiless Plunderer trigger.
3. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
4. Activate the Treasure by tapping and sacrificing it, adding .
5. Resolve the Sigil of the New Dawn trigger, causing you to pay 1 to return Ornithopter to your hand from your graveyard.
6. Cast Ornithopter by paying 0.
7. Repeat.