The Database has not been updated for the non-MMO version of the game, and likely won't be.
Master of Venoms
Weapon hits apply Venom, dealing damage over time and stacking up to 5 times. Weapon hits against enemies with 5 stacks of Venom create a Poison Cloud that deals damage and applies stacks of Venom. A Poison Cloud can only be created by this effect once every five seconds.