Aperture Shield

While holding this shield, you have advantage on any thunder or lightning damage spells. You will also be able to shield yourself and one same-sized or smaller entity for an entire turn, providing 5 additional AC for both. Neither entity can move or perform any actions but hold up the shield for this effect to apply. 

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, Combat, Warding