Mortuary + Atog + Shield Sphere + Gwenom, Remorseless

Mortuary

Atog

Shield Sphere

Gwenom, Remorseless

How it works

1. Activate Atog by sacrificing Shield Sphere
2. When Shield Sphere dies, Mortuary triggers, putting Shield Sphere from your graveyard onto the top of your library.
3. Resolve the Atog ability.
4. Cast Shield Sphere from the top of your library by paying 0 life.
5. Repeat.

This ingenious loop relies on Mortuary to intercept your creatures as they hit the graveyard, immediately recycling them back to the top of your library. Gwenom, Remorseless grants you the vital permission to play cards directly from that top spot, turning the library into an infinite-use hand where you bypass mana costs by paying life instead. Because Shield Sphere has a mana value of zero, casting it off the top of your library costs literally nothing in life, providing endless fodder for Atog to sacrifice. You can feed the free-to-cast artifact over and over to grow Atog to astronomical sizes while generating an infinite storm count and endless death triggers.