How do you use the Colossal Black Soul Gem in Oblivion
How do you use the Colossal Black Soul Gem in Oblivion
You don't 'use' it as such, you just bring it to Hannibal Traven when he sends you to get it, and then it stays in your inventory. You never need to use or activate it during the final mage guild mission, just have it there with you.