Arcbound Reclaimer + Showdown of the Skalds + Dark Sphere + The Lunar Whale

Arcbound Reclaimer

Showdown of the Skalds

Dark Sphere

The Lunar Whale

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 clever loop turns zero-mana artifacts and counter manipulation into an endless storm engine. By casting Dark Sphere for free, you trigger the second and third chapters of Showdown of the Skalds to place a +1/+1 counter back onto Arcbound Reclaimer. You can then sacrifice Dark Sphere to fulfill its damage-prevention role and use Arcbound Reclaimer's activated ability—fueled by that very counter—to recycle Dark Sphere from the graveyard straight to the top of your library. While The Lunar Whale isn't strictly required to execute the core loop, its static ability lets you look at the top card of your library at any time to verify your setup, and its attack-triggered permission can even let you play Dark Sphere right back off the top.