Jinnie Fay, Jetmir's Second + Samwise Gamgee + Cloudstone Curio + Ornithopter

Jinnie Fay, Jetmir's Second

Samwise Gamgee

Cloudstone Curio

Ornithopter

How it works

1. Cast Ornithopter by paying 0.
2. When Ornithopter enters the battlefield, Samwise Gamgee's first ability triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay.
3. When the Cat enters the battlefield, Cloudstone Curio triggers, returning Ornithopter from the battlefield to your hand.
4. Repeat.