Marrow-Gnawer + Thornbite Staff + Ayara, First of Locthwain

Marrow-Gnawer
Thornbite Staff
Ayara, First of Locthwain

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, sacrifice another rat, to create 2 1/1 Rat tokens
  2. Thornbite Staff triggers, untapping Marrow-Gnawer
  3. Ayara triggers, causing each opponent to lose 2 life and gaining you 2 life
  4. Repeat
Results
Infinite creature tokens. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite lifegain. Infinite lifeloss.