Missy + Ashnod's Altar + Coral Trickster

Missy

Ashnod's Altar

Coral Trickster

How it works

1. Activate Ashnod's Altar by sacrificing Coral Trickster, adding CC.
2. When Coral Trickster dies, Missy's first ability triggers, returning Coral Trickster from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
3. Activate a mana-producing permanent by tapping it, adding at least .
4. Activate Coral Trickster's morph ability by paying , turning it face up.
5. Coral Trickster triggers, untapping target permanent.
6. Repeat.

This clever loop relies on Missy to constantly recycle your fallen creatures into 2/2 Cyberman artifact creatures whenever they die. By sacrificing Coral Trickster to Ashnod's Altar, you generate the colorless mana needed to fund its own resurrection, while the mana spent to turn it face up is continually refunded by untapping your mana sources with Coral Trickster's triggered ability. Because Missy ensures the Trickster comes back every time it hits the graveyard, you have an endless engine of sacrifices, mana generation, and enter-the-battlefield triggers.