There are many reasons he doesn't choose to use it, [@IcePezz], but you did indeed describe one.

For the most part I am trying to avoid giving away details of his character and rationale until I can bring them up in the roleplay; examples being the bronzed scimitar, the lioness hood, [i]Incarnum[/i], Wild Shape among a few others. Just to add that level of interest and validity to his person.