It's a shield. Or is it? The shield will attempt to get away from any attacks that come at it, using the player wearing it as protection. It gives a -3 to armor class and is unremovable except through very specific curse removal magic. The shield can be identified with a dc20 Arcana Check.

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.