Identify is the standard ability of the bishop in the llylgamyn saga. It's effect is scaled to the level of the bishop casting it. The effect is rather simple, it identifies the item it is cast upon. Depending on the level of the caster the accuracy of this may be sketchy and may take a few tries. It does not however require the Bishop to expend Spell Slots and thus multiple tries at Identifying an item is probably acceptable.
The skill is extremely useful for parties at any stage of the game but particularly in the monster allocation area. The encounter with the High Ninja provides a substantial amount of loot that will be made all the more profitable with the use of the Identify skill. This is due to Boltac ripping players off for Identifying the item.