That's wise <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />, lvl 16 is a bit weak for Ionas's dungeon - though you can exit it and return later - the sewers with those lizards are tough and you fight your way through to get to Z.'s imprisonment - if you don't use invisibility potions - in that area you could have probs again. I'd wait in your case Daredevil... I entered the castle at lvl 30-35.
Kia