Displacer Kitten + Aether Channeler + Mana Crypt + Sol Ring

Displacer Kitten

Aether Channeler

Mana Crypt

Sol Ring

How it works

1. Activate Sol Ring by tapping it, adding CC.
2. Cast Mana Crypt by paying 0.
3. Displacer Kitten triggers, blinking Aether Channeler.
4. When Aether Channeler enters the battlefield, it triggers, returning Sol Ring from the battlefield to your hand.
5. Activate Mana Crypt by tapping it, adding CC.
6. Cast Sol Ring by paying 0.
7. Displacer Kitten triggers, blinking Aether Channeler.
8. When Aether Channeler enters the battlefield, it triggers, returning Mana Crypt from the battlefield to your hand.
9. Repeat.