Emry, Lurker of the Loch + Displacer Kitten + Lion's Eye Diamond + Sparring Mummy

Emry, Lurker of the Loch

Displacer Kitten

Lion's Eye Diamond

Sparring Mummy

How it works

1. Activate Emry by tapping it, targeting Lion's Eye Diamond.
2. Cast Lion's Eye Diamond from your graveyard by paying 0.
3. Displacer Kitten triggers, blinking Sparring Mummy.
4. When Sparring Mummy enters, it triggers, untapping Emry.
5. Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
6. Repeat.

This elegant loop turns Emry, Lurker of the Loch into a recursive engine by utilizing her tap ability to continually pull Lion's Eye Diamond out of your graveyard. Each time you recast the Diamond, Displacer Kitten’s avoidance trigger blinks Sparring Mummy, allowing the Mummy's entry ability to untap Emry so she can tap again. This leaves a tiny window where you can crack Lion's Eye Diamond for three mana of any color by sacrificing it and discarding your hand, fueling the mana needed to keep casting artifacts while generating an endless chain of entering, leaving, and sacrificing triggers.