Drow's Lethargic Venom

You apply a potent venom to your weapon or touch a creature, inflicting a slow-acting poison that drains both life and consciousness. 

The effects of this spell do not stack. A creature that is already under the effects of Drow's Lethargic Venom cannot be affected by it again until the duration ends.

This spell is favored by drow assassins who relish the slow demise of their enemies, watching as they succumb to the lethargy induced by the venom.