They said it couldn't be done! Karnarath.. now has the ability... to cast.. SLEEP! Well, it's not an incredible achievement, but overcoming Buggerfall to advance two ranks in the Mages' Guild was quite nice. Karnarath's power is growing. A wraith that could once kill him in two strikes now falls to his swift blade, yet those giant bats still seem to want so badly to gnaw on him. Ghosts, thieves, and mummies, oh my! The Mages' Guild is getting very close to allowing Karnarath access to item enchantment! BWAHAHAHAHA!
So I didn't quite explain well how to train destruction. Since in Daggerfall doesn't allow you to cast damaging spells on yourself directly, you have to get around that by making it a splash-damage spell, and casting it at your feet. The amount of fatigue the spell drains is barely noticeable, but it's cheap, and helps raise destruction enough to lower the cost of the standard sleep spell enough that I can cast it now, should I get that easy quest again. Also, buggy mage quests are buggy.