Osteomancer Adept + Solemnity + Samwise Gamgee + Phyrexian Altar

Osteomancer Adept

Solemnity

Samwise Gamgee

Phyrexian Altar

How it works

1. Activate Osteomancer Adept by tapping it, allowing you to cast creature spells from your graveyard this turn by foraging in addition to the spell's other costs.
2. Cast the creature card that can be cast using one colored mana from your graveyard by paying its mana cost and sacrificing a Food.
3. When the creature enters the battlefield, Samwise triggers, creating a Food token.
4. Activate Phyrexian Altar by sacrificing the creature, adding one mana of any color.
5. Repeat from step 2.

This engine transforms the graveyard into an endless workshop by letting Osteomancer Adept grant the ability to cast creature spells from your graveyard using forage costs. Thanks to Solemnity preventing finality counters from ever landing on those returning creatures, you never have to worry about them being exiled upon dying. Meanwhile, Samwise Gamgee churns out a fresh Food token every time one of those creatures enters the battlefield, feeding the very cost you need to recast them. Finally, Phyrexian Altar acts as the sacrificial engine that turns each loop into the exact colored mana required to keep the cycle spinning infinitely.