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

Arcbound Reclaimer

Showdown of the Skalds

Mishra's Bauble

Experimental Frenzy

How it works

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

This clever loop turns the top of your library into an endless engine by combining Experimental Frenzy's ability to cast from the library with Mishra's Bauble's zero-mana casting cost. Each time you cast the Bauble from the top, Chapters II and III of Showdown of the Skalds trigger to reward the spellcast by placing a +1/+1 counter on Arcbound Reclaimer. You then sacrifice the Bauble to draw a card later, which immediately fuels Arcbound Reclaimer's activated ability: you spend that newly placed counter to recycle Mishra's Bauble right back onto the top of your library, ready to be cast all over again.