Emry, Lurker of the Loch + Displacer Kitten + Lion's Eye Diamond + Flash Thompson, Spider-Fan

Emry, Lurker of the Loch

Displacer Kitten

Lion's Eye Diamond

Flash Thompson, Spider-Fan

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 Flash Thompson.
4. When Flash Thompson enters, it triggers, untapping Emry.
5. Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
6. Repeat.

This clever loop turns Emry, Lurker of the Loch into a recursive engine that continuously recasts Lion's Eye Diamond from your graveyard for zero mana. Each time you cast that artifact, Displacer Kitten triggers to blink Flash Thompson, whose entry ability immediately untaps Emry so she can tap to do it all over again. Before sacrificing Lion's Eye Diamond for three mana each cycle, you can tap it to pay for Emry's activation or simply let the floating mana accumulate into an infinite pool of any color.