Terra Crewman - Opticore

Crewman (You can group up any number of
attacking Corpus creatures to this card, they
count as a "single creature" for blockers.)
Charged Weapon ({t} Put a "Charge
counter" on this creature. Use this ability
any time you could use a sorcery.)
This creature has -3 power without a
"Charge Counter". Remove all "Charge Counter"
when this creature deals combat damage.