Horn of Herionius
An ancient battle horn.
An ancient battle horn with the symbol of Herniation carved into it.
When the horn is blown, once per a day the ability can be activated. The blower of the horn receives a +4 AC and a +4 to Will saves while everyone else within 25 ft. of the blower receives +2 AC and +2 Will for the duration of the encounter.
The horn is rumored to have belong to a Pit Fiend before he meet his demise at Herionius’s hand before ascending into the ranks of the Deities.