Displacer Kitten + Aether Channeler + Mana Vault + Jeweled Lotus

Displacer Kitten

Aether Channeler

Mana Vault

Jeweled Lotus

How it works

1. Cast Mana Vault by paying 1.
2. Displacer Kitten triggers, blinking Aether Channeler.
3. When Aether Channeler enters the battlefield, it triggers, returning Jeweled Lotus from the battlefield to your hand.
4. Activate Mana Vault by tapping it, adding CCC.
5. Cast Jeweled Lotus by paying 0.
6. Displacer Kitten triggers, blinking Aether Channeler.
7. When Aether Channeler enters the battlefield, it triggers, returning Mana Vault from the battlefield to your hand.
8. Repeat.