Marrow-Gnawer + Thornbite Staff + Altar of the Brood

Marrow-Gnawer
Thornbite Staff
Altar of the Brood

Requires
All permanents on the battlefield. Thornbite Staff attached to Marrow-Gnawer. Marrow-Gnawer does not have summoning sickness. You control at least two additional Rats.
Steps
  1. Tap Marrow-Gnawer sacrificing another rat, creating 2 1/1 Rat tokens
  2. Thornbite Staff triggers, untapping Marrow-Gnawer
  3. Altar of the Brood triggers milling each opponent 2
  4. Repeat
Results
Infinite creature tokens. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite mill.