Anticausal Vestige + Cloudstone Curio + Deceptive Frostkite

Anticausal Vestige

Cloudstone Curio

Deceptive Frostkite

How it works

1. Cast Deceptive Frostkite by paying its mana cost. Choose to have it enter as a copy of Anticausal Vestige.
2. When Deceptive Frostkite enters, Cloudstone Curio triggers, returning Anticausal Vestige from the battlefield to your hand.
3. When Anticausal Vestige leaves the battlefield, it triggers, causing you to draw a card and and put Anticausal Vestige from your hand onto the battlefield.
4. When Anticausal Vestige enters, Cloudstone Curio triggers, returning Deceptive Frostkite from the battlefield to your hand.
5. When Deceptive Frostkite leaves the battlefield, it triggers, causing you to draw a card and put Deceptive Frostkite from your hand onto the battlefield as a copy of Anticausal Vestige.
6. Repeat from step 2.

This elegant loop relies on Cloudstone Curio to perpetually bounce your pieces back to hand whenever a new one enters the battlefield. By using Deceptive Frostkite to perpetually copy Anticausal Vestige, the constant stream of leaves-the-battlefield triggers lets you continuously draw cards and cycle the permanents right back onto the battlefield. Because both creatures share the same permanent types while bouncing one another, Cloudstone Curio keeps the engine turning indefinitely without needing any external mana.