Tusk

Ymir the Tusk is a melee strength initiator hero that packs a lot of disables which gives a sure kill in every gank. With his snowball, he can gank any enemies while bringing your nearby teammates with you the time you cast it. His Ice Shards is more effective blocking narrow paths, shortcuts, and any places where enemies can escape. Frozen Sigil could be used for crowd control or escaping. Tusk's ultimate, walrus punch is a devastating skill which when applied to an enemy will deal a disable with a short duration, followed by a slow. However, Black King Bar blocks the disable, but the slow and damage is still applied. Tusk is more effective on early and mid game. He is perfect teaming up with disablers and heroes that deals burst damage and AoE spells such as Earthshaker, Magnus, Tidehunter, etc. Snowball alone can give a successful gank if tusk brings any nearby teammate with him. He is very dangerous and deadly if not given attention. Feeding him in Early and Mid game can make him a ferocious opponent in the late part of the match.

Trivia

 * In DotA, he was known as Tuskarr. The Tuskarr are a race of humanoid walruses in the Warcraft universe.