How to counter Venomancer in Dota 2

Launches a ball of venom in a line, poisoning enemy units so that they take both initial damage and damage over time, as well as suffering slowed movement. Venomous Gale deals damage every 3 seconds over its duration.

Venomancer summons a Spawn of Aktok to sink its fangs into a target, dealing magic damage and applying a toxin that does damage every second. When the target attacks while infected, they take the initial damage again.

Summons a plague ward to attack enemy units and structures. The ward is immune to magic. Wards gain the Poison Sting level from Venomancer, dealing 50% of the full damage.

Venomancer's attacks slow enemies and deal damage over time.

Infects an enemy with a plague that does damage on application then slows the target and deals damage over time based on their maximum health. When the debuff ends for any reason, all debuffs from Venomancer on the initial target and the plague are spread to nearby targets. Additional spreads beyond the first do not deal impact damage.