Yedora, Grave Gardener + Embodiment of Insight + Altar of Dementia

Yedora, Grave Gardener
Embodiment of Insight
Altar of Dementia

Requires
All permanents on the battlefield. You control a nontoken land creature.
Steps
  1. Activate Altar of Dementia by sacrificing a nontoken land creature
  2. When the land creature dies, Yedora triggers, returning the card to the battlefield face down as a Forest land
  3. When the Forest enters the battlefield, Embodiment of Insight triggers, causing the Forest to become a 3/3 Elemental creature with haste in addition to its other types
  4. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to the sacrificed creature's power
  5. Activate the Elemental by tapping it, adding g
  6. Repeat
Results
Infinite green mana. Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite landfall triggers. Infinite mill. Infinite self-mill.