Spawning Pit has at least two charge counters on it.
({1} magic symbol) available.
Steps
Activate Spawning Pit's second ability by paying ({1} magic symbol) and removing two charge counters from it, creating a 2/2 Pincher and a 1/1 Squirrel creature token.
Activate Lightning Greaves' equip ability by paying ({0} magic symbol) , attaching it to the Pincher.
Activate the Pincher by tapping it, adding ({G} magic symbol) .
Activate Spawning Pit's first ability by sacrificing the Pincher, putting a charge counter on Spawning Pit.
Repeat from step 2 using the Squirrel token instead.