Osteomancer Adept, Solemnity, Gilded Goose, and Phyrexian Altar

Prerequisites

• Osteomancer Adept on the battlefield
• Solemnity on the battlefield
• Gilded Goose in the graveyard
• Phyrexian Altar on the battlefield
• Osteomancer Adept does not have summoning sickness
• You control at least one Food
• available

Steps

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 Gilded Goose from your graveyard by paying and sacrificing a Food, causing it to not enter the battlefield with a finality counter on it due to Solemnity
3. When Gilded Goose enters the battlefield, it triggers, creating a Food token
4. Activate Phyrexian Altar by sacrificing Gilded Goose, adding
5. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count