You summon temporary weightless magic armor custom fitted for you.

Mage Armor is an alternative to armor.
While wearing Mage Armor, you can use its AC bonus instead of your body armor’s AC bonus.
(This spell can replace and be better than armor, but when paired with armor may confer a lesser or potentially even no benefit.)

When you cast this spell, it is accompanied by a transformation sequence.
You control the cosmetic aspects and appearance of your Mage Armor when you conjure it. Once Mage Armor has been cast, changing its appearance without recasting the spell requires passing a test of Spellcraft.
You can only receive the benefits of one Mage Armor at a time.
You can end this spell (and transform back) as a fast action.

Some users of this spell choose to wear armor for redundancy purposes in case their mage armor is dispelled. Others wear armor which covers areas this spell does not. Still others wear no armor and rely entirely on this spell.

Suggested Backfire: Your spellburn die size decreases, instead of remaining where it was.