Adamantine collar

A collar made of adamantine, one of the hardest substances in existence. While you're wearing it, any critical hit against you becomes a normal hit. This item is welded shut to the individual when put on and is impossible to take off.

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.

Notes: Immunity: Critical Hits, Combat, Warding