Arcbound Reclaimer + Showdown of the Skalds + Dark Sphere + Mm'menon, the Right Hand

Arcbound Reclaimer

Showdown of the Skalds

Dark Sphere

Mm'menon, the Right Hand

How it works

1. Cast Dark Sphere either from your hand or from the top of your library by paying 0
2. Showdown of the Skalds triggers, putting a +1/+1 counter on Arcbound Reclaimer.
3. Activate Dark Sphere by tapping and sacrificing it.
4. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Dark Sphere from your graveyard onto the top of your library.
5. Repeat.

This loop is an exquisite piece of mechanical alchemy, turning a modest zero-mana artifact into an infinite engine. By casting Dark Sphere for free, you trigger Showdown of the Skalds's second and third lore chapters to feed a +1/+1 counter straight onto Arcbound Reclaimer. The Reclaimer then cashes in that very counter to recycle Dark Sphere from your graveyard right back to the top of your library. Finally, Mm'menon, the Right Hand lets you look at the top card of your library and immediately recast Dark Sphere from the top, sustaining the cycle indefinitely while generating endless sacrifices and storm count.