Muldrotha, the Gravetide + Displacer Kitten + Sol Ring + Megatog

Muldrotha, the Gravetide

Displacer Kitten

Sol Ring

Megatog

How it works

1. Activate Sol Ring by tapping it, adding CC.
2. Activate Megatog by sacrificing Sol Ring, giving Megatog +3/+3 until end of turn.
3. Cast Sol Ring from your graveyard by paying 1.
4. Displacer Kitten triggers, blinking Muldrotha.
5. Repeat.

This cunning loop centers around Muldrotha, the Gravetide, whose permanent-type casting permissions allow Sol Ring to return to the battlefield directly from your graveyard once it hits the bin. The engine is fueled by sacrificing that very Sol Ring to Megatog, pumping up the beast while clearing the artifact away to be replayed. Every time you recast the ring, Displacer Kitten triggers off the noncreature spell to blink Muldrotha, cleverly resetting your per-turn casting restrictions and keeping the cycle spinning infinitely.