Arcbound Reclaimer + Showdown of the Skalds + Welding Jar + Magus of the Future

Arcbound Reclaimer

Showdown of the Skalds

Welding Jar

Magus of the Future

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.

This brilliant loop relies on Magus of the Future to let you continuously play an artifact directly from the top of your library, fueled by Welding Jar costing zero mana. Each time you cast that free artifact, Showdown of the Skalds triggers its second and third chapters to place a fresh +1/+1 counter onto Arcbound Reclaimer. That counter immediately feeds Arcbound Reclaimer's activated ability, allowing you to pay the cost and place the sacrificed Welding Jar right back on top of your library where Magus of the Future can see it again.