Luminous Broodmoth + Solemnity + Phyrexian Altar

Luminous Broodmoth

Solemnity

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing a creature without flying, adding one mana of any color.
2. When the creature dies, Luminous Broodmoth triggers, returning the creature from your graveyard to the battlefield without a flying counter on it due to Solemnity.
3. Repeat.

This brilliant loop turns your graveyard into a revolving door by leveraging Luminous Broodmoth to constantly resurrect your grounded creatures whenever they meet their end. Ordinarily, the Moth would hand out flying counters that would prevent the creature from dying without flying a second time, but Solemnity acts as the ultimate prophylactic here by completely forbidding any counters from ever being placed on your permanents. This means every revival comes with a clean slate, allowing you to feed the same creature endlessly into Phyrexian Altar to generate an infinite supply of colored mana alongside endless death, entrance, and sacrifice triggers.