Arcbound Reclaimer + Showdown of the Skalds + Welding Jar + Mm'menon, the Right Hand

Arcbound Reclaimer

Showdown of the Skalds

Welding Jar

Mm'menon, the Right Hand

How it works

1. Cast Welding Jar 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 Welding Jar by sacrificing it.
4. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Welding Jar from your graveyard onto the top of your library.
5. Repeat.