Activate Thopter Squadron' first ability by paying ({1} magic symbol) and removing a +1/+1 counter from it, creating two 1/1 Thopter artifact creature tokens.
Activate Ashnod's Altar by sacrificing a Thopter, adding ({C} magic symbol) ({C} magic symbol) .
Activate Thopter Squadron' second ability by paying ({1} magic symbol) and sacrificing a Thopter, putting a +1/+1 counter on Thopter Squadron.