I was fighting a druagr Deathlord in a dungeon (where they are mostly found), and I'd been disarmed. I used unrelenting force to shout him onto a ledge. I took the opportunity to heal myself with some magic, and I realized that it was not depleting despite my having used the spell. The draugr was stuck on the ledge for some reason, so I bombarded him with flames until he died (still having full magic despite having used flames). My question is: Has anyone else experienced this? And if so, have they figured out how to replicate it? I know it's a glitch, but some glitches can be enacted on purpose.
My guess would be maybe you have an extremely high magic stat or maybe it just bugged out and didn't show the magic bar as moving. I've never heard off that glitch before. I wish you good luck friend, Talos be with you.