Creature - Bone Spider
76 Hit Points, AC 17
Ability Scores: Str 20, Dex 15, Con -, Int 6, Wis 10, Cha 1
CR Rating: 8
Special Abilities: Darkvision, Magical Poison, Damage Reduction 10/Bludgeoning, Spell Resistance, Construct Traits.
Necromancers through the ages have labored ceaselessly to bring about undead perfection. Why they simply cannot be satisfied with such perfection in life itself is something of much speculation, but everyone pretty much agrees that bone spiders are perhaps the worst answer to undead perfection ever.
The bone spider is a construct made from specially treated bones - and even more irritating, the necromancer laced the bone spider’s fangs with a deadly magical poison, so that its sting is even greater than its living counterpart. Fortunately, its intelligence is still that of a feral spider, except with the ability to understand such simple commands as "stay," "sit," and "stop playing with the halfling's corpse".