Blue

Changeling (This card is every creature type) Thopters you control get +2/+2 and artifact creatures have combine battlefield {2}. (Exile one artifact creature card from your hand and an artifact creature you control from the battlefield, those cards enter with their power equal to their total power, its toughness is equal to their total toughness, and it has their names, mana costs, types, text boxes, etc.) Whenever you combine an artifact creature, create a tapped powerstone token.