Thopter Hive

({p/g} can be paid with either {g} or 2 life.)
Whenever a creature enters the battlefield, if it wasn't a Thopter, create two 1/1 artifact Thopter creature tokens with flying and supercharge 1. (Whenever a creature with supercharge 1 enters the battlefield, you may tap an untapped artifact you control. If you do, that creature enters the battlefield with a +1/+1 counter on it.)