Cunning Artifice is a heroic tier feat.
Prerequisite: Changeling, changeling trick racial power, artificer
Benefit: You can substitute an Arcana check for a Bluff check made as part of using your changeling trick racial power.
Also, while using an artificer melee attack power, when you hit an enemy that grants combat advantage to you, the target grants combat advantage to all attackers until the start of your next turn.[Dr387:33]