Zombies

Zombies are a low-level form of corporeal undead, common enough that most in Faerûn have heard of them, though relatively few have had a direct encounter.
Zombies are extremely easy to hit, lacking both dexterity and speed. They are also not particularly hardy, though they're more than capable of outlasting your average commoner. Though immune to poison, they have no other damage resistances, making them a fight even your average barmaid might be able to win. The main danger with a zombie is their ability to cling on to what scraps of life they still have — one might be knocked down again and again and again before the necromantic animation of the corpse finally sticks.
Zombies are typically raised by necromantic magic, and at least initially will follow the will of a master, though once set free they'll continue aimless, wandering aggression until struck down.