For future reference...
Design a suit of masterwork plate armor for the mage, and enchant it so that, if worn, it is shunted into an extradimensional space (that still surrounds the mage). It thus gives no bonuses to defense, nor penalties for wearing armor. For all intents & purposes, it is not there...until you enter an anti-magic field.
With the magic of the armor being negated, the armor then coalesces around the mage, seemingly from nowhere, giving him both warning that he has entered an anti-magic field and protecting him at the same time.
Call it the Armor of Beeblebrox.
Design a suit of masterwork plate armor for the mage, and enchant it so that, if worn, it is shunted into an extradimensional space (that still surrounds the mage). It thus gives no bonuses to defense, nor penalties for wearing armor. For all intents & purposes, it is not there...until you enter an anti-magic field.
With the magic of the armor being negated, the armor then coalesces around the mage, seemingly from nowhere, giving him both warning that he has entered an anti-magic field and protecting him at the same time.
Call it the Armor of Beeblebrox.