Character Level	Minor
4th	+2 on Disguise checks
8th	Alter Self 1/day (Sp)
12th	Charisma +1
16th	Detect Thoughts 1/day (Sp)
20th	Doppelganger Affinity +2*

   * You gain the indicated bonus on all Bluff, Diplomacy, Gather Information, Intimidate, and Perform checks made to interact with doppelgangers.