Thopter Squadron with two or more +1/+1 counters on it).
Mana Needed
({1} magic symbol) available.
Steps
Activate
Thopter Squadron's first ability by paying ({1} magic symbol) and removing a +1/+1 counter from it, creating a Food and a 1/1 Thopter artifact creature tokens.
Activate
Krark-Clan Ironworks by sacrificing the Food, adding ({C} magic symbol) ({C} magic symbol) .
Activate
Thopter Squadron's second ability by paying ({1} magic symbol) and sacrificing the Thopter, putting a +1/+1 counter on it.