Salt

Salt was a currency used to purchase Allegiance rewards from the Allegiance Merchant. This currency was later replaced with Talents in Early Access v0.9.2. Salt is considered a blessed item.

Source
Like Talents, Salt could collected by taking part in Allegiance events while in an Allegiance. Unlike Talents, this was gained in an event known as Cleansing Spirits. Players gained Salt while subduing Lost Spirits during the event.