The idea behind Venom is novel: ignore a monster's defenses, poison it and stop its healing, then make it flee as the poison wears its life down. The lack of enhanced damage and increased attack speed makes it unsuitable for most physical attacking builds, though.
Hit Causes Monster To Flee 25%
Prevent Monster Heal
Ignore Target's Defense
7% Mana Stolen Per Hit
Level 15 Poison Explosion (27 Charges)
Level 13 Poison Nova (11 Charges)
+273 Poison Damage Over 6 seconds