Emry, Lurker of the Loch + Displacer Kitten + Welding Jar + Deceiver Exarch

Emry, Lurker of the Loch

Displacer Kitten

Welding Jar

Deceiver Exarch

How it works

1. Activate Emry by tapping it, targeting Welding Jar.
2. Cast Welding Jar from your graveyard by paying 0.
3. Displacer Kitten triggers, blinking Deceiver Exarch.
4. When Deceiver Exarch enters, it triggers, untapping Emry.
5. Activate Welding Jar by sacrificing it.
6. Repeat.

This delightful loop relies on Emry, Lurker of the Loch pulling Welding Jar from the graveyard over and over again for free, since the artifact costs nothing to recast. Every time you cast that zero-mana artifact, Displacer Kitten's trigger blinks Deceiver Exarch. The entering Exarch untaps Emry so she can tap again, while Welding Jar's own ability sits ready to be sacrificed should you ever need to regenerate an artifact.