the shield of many unknown whispers while attuned to this shield you get a +3 to your AC

at all times this shield whispers in what sounds like hundreds of languages at the same time but in the presence of a creature of the DMs choice it goes silent 

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: Bonus: Armor Class, must complete a long rest to attune to this item