Arcbound Reclaimer + Showdown of the Skalds + Urza's Bauble + Experimental Frenzy

Arcbound Reclaimer

Showdown of the Skalds

Urza's Bauble

Experimental Frenzy

How it works

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

This loop turns the top of your library into a self-sustaining engine by marrying the card-casting freedom of Experimental Frenzy with the recursive artifact recycling of Arcbound Reclaimer. While Experimental Frenzy lets you cast Urza's Bauble directly from the top of your library, chapters II and III of Showdown of the Skalds provide the crucial +1/+1 counters needed to fuel Arcbound Reclaimer's ability. By repeatedly casting Urza's Bauble, triggering Showdown of the Skalds to replace the counter, and cashing in Arcbound Reclaimer to put the Bauble right back on top, you generate an endless storm count and infinite artifact triggers.