Sea Snake's Poisonous Bite.

Regular (poisonous) bite doesn't affect some creatures but the manual (and much much weaker) bite does. For some reason I thought this had been addressed so that even if immune to something like poison the physical damage would still apply. By design or bug? You bury your teeth in a kuo-toa warrior's body. Your bite decimates a kuo-toa warrior! A kuo-toa warrior has a few scratches. You dodge a kuo-toa warrior's attack. A kuo-toa warrior's slice misses you. A kuo-toa warrior is unaffected by your poisonous bite! A kuo-toa warrior has a few scratches.