Derevi, Empyrial Tactician + Aether Vial + Cloudstone Curio + Pestermite

Derevi, Empyrial Tactician

Aether Vial

Cloudstone Curio

Pestermite

How it works

1. Activate Aether Vial by tapping it, putting Pestermite onto the battlefield from your hand.
2. When Pestermite enters the battlefield, it and Cloudstone Curio trigger.
3. Resolve the Pestermite trigger, untapping Aether Vial.
4. Resolve the Cloudstone Curio trigger, returning Derevi from the battlefield to your hand.
5. Activate Aether Vial by tapping it, putting Derevi onto the battlefield from your hand.
6. When Derevi enters the battlefield, it and Cloudstone Curio trigger.
7. Resolve the Derevi trigger, untapping Aether Vial.
8. Resolve the Cloudstone Curio trigger, returning Pestermite from the battlefield to your hand.
9. Repeat.

This clever loop relies on the constant interplay of entering and leaving the battlefield to bounce your creatures back to your hand for free. Aether Vial serves as your primary engine, cheating out threats like Pestermite and Derevi, Empyrial Tactician while bypassing mana costs entirely. Whenever either creature arrives, Cloudstone Curio triggers to return the other back to your hand, allowing you to replay them continuously. Meanwhile, both Pestermite and Derevi feature enter-the-battlefield abilities that untap Aether Vial, keeping your artifact primed to repeat the cycle infinitely.