Assassination Tome: Envenom IV

"Finishing move that consumes your Deadly Poison doses on the target and deals instant poison damage. Following the Envenom attack you have an additional chance to apply Deadly Poison and a increased frequency of applying Instant Poison for 1 sec plus an additional 1 sec per combo point. One dose is consumed for each combo point: 1 dose: damage 2 doses: damage 3 doses: damage 4 doses: damage 5 doses: damage"