Arcbound Reclaimer + Showdown of the Skalds + Lion's Eye Diamond + Crystal Skull, Isu Spyglass

Arcbound Reclaimer

Showdown of the Skalds

Lion's Eye Diamond

Crystal Skull, Isu Spyglass

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 triggers, putting a +1/+1 counter on Arcbound Reclaimer.
3. Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
4. 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.
5. Repeat.

This clever loop hinges on recycling Lion's Eye Diamond right back to the top of your library using Arcbound Reclaimer's ability to feed its own upkeep. Crystal Skull, Isu Spyglass lets you immediately play the Diamond from the top of your library again, generating a continuous stream of mana while Showdown of the Skalds conveniently supplies the +1/+1 counters needed to fuel the Reclaimer over and over.