Casting Detect Magic in the presence of an artifact will cause the caster to be blinded as the spell Blindness/Deafness, save that the caster will only be blinded for 1d4 days instead of permanently. The blindness can be removed with a Remove Blindness, or Remove Curse spell.
Magical items will increase or decrease up to 1 size category as necessary based on the wielder’s size category. For example, a medium suit of +1 half-plate will resize it self to fit a small sized halfling, or a large sized ogre depending on who is attempting to put it on. Likewise a large-sized suit of +2 banded mail will resize itself to fit a medium-sized human or a huge-sized giant.