Cast Delif's Cone either from your hand or from the top of your library by paying 0
Showdown of the Skalds triggers, putting a +1/+1 counter on Arcbound Reclaimer.
Activate Delif's Cone by tapping and sacrificing it.
Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Delif's Cone from your graveyard onto the top of your library.
Repeat.
This clever loop relies on the continuous filtering provided by The Reality Chip, which allows you to repeatedly cast Delif's Cone right off the top of your library for zero mana. Each time you cast that artifact, Showdown of the Skalds triggers its second and third lore chapters to feed a +1/+1 counter straight onto Arcbound Reclaimer. You then instantly use that newly placed counter to fuel Arcbound Reclaimer's activated ability, recycling Delif's Cone from your graveyard right back to the top of your library to keep the cycle spinning endlessly.