A Shield of one-way glass rendered unbreakable. You can spend an action to sacrifice it's transparency in exchange for spikes to come out of the front. You could spend a further 3 actions to become invisible.

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: Damage: Piercing, Utter the secret word. Can Be found using the Lore Spell.