Arcbound Reclaimer + Showdown of the Skalds + Delif's Cone + Crystal Skull, Isu Spyglass

Arcbound Reclaimer

Showdown of the Skalds

Delif's Cone

Crystal Skull, Isu Spyglass

How it works

1. Cast Delif's Cone 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 Delif's Cone by tapping and sacrificing it.
4. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Delif's Cone from your graveyard onto the top of your library.
5. Repeat.