Arcbound Reclaimer + Showdown of the Skalds + Elsha of the Infinite + Lion's Eye Diamond

Arcbound Reclaimer

Showdown of the Skalds

Elsha of the Infinite

Lion's Eye Diamond

How it works

1. Cast Lion's Eye Diamond either from your hand or from the top of your library by paying 0
2. Showdown of the Skalds and Elsha's prowess ability trigger.
3. Resolve the Showdown of the Skalds trigger, putting a +1/+1 counter on Arcbound Reclaimer.
4. Resolve the Elsha trigger, giving it +1/+1 until end of turn.
5. Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
6. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Lion's Eye Diamond from your graveyard onto the top of your library.
7. Repeat.

By leveraging Elsha of the Infinite, you gain the ability to cast Lion's Eye Diamond directly from the top of your library with flash, while also keeping your hand clear to feed its mana-generating sacrifice ability. Each time you cast the artifact, Showdown of the Skalds steps in with its triggered ability to place a +1/+1 counter onto Arcbound Reclaimer, fueling the Reclaimer's activated ability so it can constantly recycle Lion's Eye Diamond right back to the top of your library. Elsha's prowess ability also layers on free temporary buffs with every cast, completing a tightly wound engine that churns out infinite mana, storm count, and triggers.