Poison Cloud: Instant cast. 8 sec duration. 10 min CD. 15 yards radius
Throw a flask of poison at your location doing x nature damage every 2 seconds and slowing movement speed by 75% to all targets within the Poison Cloud for 8 secs. In addition while you are in the Poison Cloud you will become stealthed for the duration.
(requires 50 points in subtlety)