The potion of greater invis no longer lasts 10 minutes for me. For about 30 levels it worked fine but all of a sudden the potion runs out after 1-3 turns. I tried taking all my armor off to see if that was the cause, I tried using dispel and remove curse and nothing seems to fix it. I'm an elf wizard with 5 Theurg. Someone said using theurg may cancel the potion but for the 30 lvls I used the potion I could cast light dart and summon fairies with no issue. No message appears in the Room box when my potion wears off. Any help would be greatly appreciated, thanks!