When I first started playing EQ, Omens was the latest expansion. When my fresh DE Enchanter was just starting out from Neriak, hoping to finally be able to fight his way through Nektulos Forest to the PoK book and visit the Plane of Knowledge I'd heard so much about, I would frequently encounter Undead mobs, and was forced to run back to the guards at the entrance to Neriak where they would destroy the mobs chasing me. I didn't usually fight Undead. The reason being is that I assumed that my DoTs would be useless against Undead. Based on their description, my DoTs caused asphyxiation. Since Undead don't need oxygen, I simply assumed my DoTs wouldn't work on them. Obviously, I have since learned that that's not the case, and my DoTs work on Undead as well as anything else. So, does anyone else have any interesting faulty assumptions they made when just starting out in EQ?