Ghoul saliva

contact (toxin) - 600 gp
ToxinThis greenish oil made by clerics feels rot and paralyzes the lower limbs of its victims.
A creature subjected to this poison must make a DC 13 Constitution saving throw. In case of failure, the creature is restrained for 2d6 minutes, or half as this duration on a successful one.
Recueil des poisons d´AideDD