Yedora, Grave Gardener + Life and Limb + Altar of Dementia

Yedora, Grave Gardener
Life and Limb
Altar of Dementia

Requires
All permanents on the battlefield. You control a nontoken Saproling and/or creature with changeling.
Steps
  1. Activate Altar of Dementia by sacrificing a nontoken Saproling or creature with changeling
  2. When the creature dies, Yedora triggers, returning the creature from your graveyard to the battlefield face down as a Forest land and as a 1/1 Saproling due to Life and Limb
  3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
  4. Repeat
Results
Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite landfall triggers. Infinite mill. Infinite self-mill.