Missy + Carrion Feeder + Coral Trickster

Missy

Carrion Feeder

Coral Trickster

How it works

1. Activate Carrion Feeder by sacrificing Coral Trickster.
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. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
4. Activate a mana-producing permanent by tapping it, adding at least .
5. Activate Coral Trickster's morph ability by paying , turning it face up.
6. Coral Trickster triggers, untapping target permanent.
7. Repeat.

This crafty loop turns the graveyard into a revolving door by exploiting Missy’s ability to resurrect fallen nonartifact creatures as face-down 2/2 Cybermen. You feed Coral Trickster to Carrion Feeder, whose sacrifice ability fuels the engine while growing permanently larger with new +1/+1 counters. Missy immediately catches the dying Trickster, returning it to the battlefield as a face-down artifact creature ready to be recycled. Finally, Coral Trickster's own morph cost allows you to turn it face up for just single blue mana, triggering its untap ability to free up the very mana source you need to sustain the entire loop indefinitely.