Maja, Bretagard Protector + Ashaya, Soul of the Wild + Cloudstone Curio + Ornithopter

Maja, Bretagard Protector

Ashaya, Soul of the Wild

Cloudstone Curio

Ornithopter

How it works

1. Cast Ornithopter by paying 0.
2. When Ornithopter enters the battlefield as a Forest land due to Ashaya, Maja triggers, creating a 1/1 Human Warrior creature token.
3. When the Human Warrior enters the battlefield, Cloudstone Curio triggers, returning Ornithopter to your hand from the battlefield.
4. Repeat.

This clever loop turns the zero-mana Ornithopter into a self-returning engine by leveraging Ashaya, Soul of the Wild, which transforms all your nontoken creatures into Forest lands in addition to their other types. Because Ornithopter counts as a land upon entry, casting it triggers Maja, Bretagard Protector to produce a 1/1 Human Warrior token. That new token's arrival then triggers Cloudstone Curio, allowing you to bounce the Ornithopter back to your hand so you can recast it all over again.