Patch reference

Allows Lone Druid to Entangle enemies once they gain 5 stacks of this ability. Entangled enemies are unable to move for 1.2/1.6/2/2.4s and take 60/70/80/90 damage per second. When cast, applies 2 stacks to each enemy hero in the area and 5 stacks to enemy creeps, and also empowers Lone Druid for 10 seconds, making him apply 1 stack with each attack on enemy heroes. Enemies are protected from gaining new stacks while they're already Entangled. Radius: 350. Stack Duration: 10s. Cast Range: 700. Mana Cost: 60. Cooldown: 24/22/20/18s