*If you cancel the dialogue and sneak behind it, it is possible to pickpocket its weapon with a high enough skill. It carries a random enchanted main weapon and an iron dagger. You may also attack it from behind to weaken it before talking to it and resuming dialogue. But if you kill it without resuming dialogue, you will not be able to summon it again.
*It is possible to defeat the Unbound Dremora and pick up his weapon before he has been banished.