Emry, Lurker of the Loch + Displacer Kitten + Welding Jar + Hyrax Tower Scout

Emry, Lurker of the Loch

Displacer Kitten

Welding Jar

Hyrax Tower Scout

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 Hyrax Tower Scout.
4. When Hyrax Tower Scout enters, it triggers, untapping Emry.
5. Activate Welding Jar by sacrificing it.
6. Repeat.

This clever engine loops artifacts and creatures through the graveyard and the battlefield by pairing Emry, Lurker of the Loch with the clever blinking of Displacer Kitten. Every time you cast Welding Jar for free from your graveyard using Emry's tap ability, the Kitten triggers to blink Hyrax Tower Scout; as the Scout re-enters, its triggered ability untaps Emry so you can repeat the process indefinitely. Meanwhile, the Welding Jar you're constantly sacrificing and recasting acts as a free catalyst to fuel infinite artifact enters-the-battlefield, leaves-the-battlefield, and sacrifice triggers.