Grand Architect 53 (Double Masters)

Other blue creatures you control get +1/+1. {U}: Target artifact creature becomes blue until end of turn. Tap an untapped blue creature you control: Add {C}{C}. Spend this mana only to cast artifact spells or activate abilities of artifacts.

NM - $1.80
LP - $1.50
MP - $1.50
HP - $1.50
DMG - $1.50