Muldrotha, the Gravetide + Displacer Kitten + Bartolomé del Presidio + Enthusiastic Mechanaut

Muldrotha, the Gravetide

Displacer Kitten

Bartolomé del Presidio

Enthusiastic Mechanaut

How it works

1. Cast the artifact from your graveyard by paying 0.
2. Displacer Kitten triggers, blinking Muldrotha.
3. Activate Bartolomé del Presidio by sacrificing the artifact.
4. Repeat.

This loop relies on Muldrotha, the Gravetide granting you access to recast artifacts directly from your graveyard, while Enthusiastic Mechanaut steps in as a cost reducer to make that recursion free. Each time you cast that artifact, Displacer Kitten triggers off the noncreature spell to blink Muldrotha, refreshing your permission to play things from the graveyard. Meanwhile, Bartolomé del Presidio provides a sacrifice outlet to send the artifact right back to the graveyard, growing its own +1/+1 counters in the process and feeding a continuous cycle of enters-the-battlefield and leaves-the-battlefield triggers.