Blue Mages really like to put on a show. They are always wearing a mask of some kind.

Mask Effect Cost
Angel Face Immunity: Berserk 500
Nose-and-Glasses Immunity: Seal 500
Classic Blue Mask Immunity: Berserk, Seal, Poison 1,500
Scuba Goggles Resistance: Water 2,000
Bunny Ears +10 Agility; +10 Spirit 3,000
Horror Mask -5 Critical; +15 Strength 3,500
Smiley Face +20 Spirit; Immunity: Death 4,000
Oni Mask Immunity: All Negative Status Effects ARTIFACT
Faceless Black Mask +25 Magic; +2dn Shadow Boost ARTIFACT