Aegis

A bronze roundshield addorned with a golden face of a gorgon.
The attuned wielder of this shield gets a total AC bonus from this shield of +4

Celestial blessing
Once per day at dawn the  attuned wielder of this shield can set the shield's resistance to an elemental damage type of choice for the duration of the day.

Roar of Terror
When you receive your first hit (or block) during combat, the shield lets out a terrifying roar.
All creatures (excluding the attuned wielder) within a 30 ft radius, have to make a DC15 Wisdom saving throw or be feared.
Affected creatures can make a DC15 saving throw at the start of their turn, to get rid of this effect.

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: Resistance: All, Bonus: Armor Class, Frightened