Lifestealer

N'aix the Lifestealer is a melee strength hero whose abilities give him combat ability with the amount of blood he can take and the power to storm straight out of hiding into fights. Although he is not directly as strong as other heroes, his lifesteal means he takes down enemy heroes regardless of their health and increases damage heavily with his attack speed, making him a powerful soft carry with items.

His Rage dispels debuffs for effective magic immunity which with his passives mean he is an excellent counter to both enemy spellcasters and tanks. His iconic Infest meanwhile means he can unexpectedly burst onto enemies from inside other units. Open Wounds opens the taking of life to be benefitted by both his allies as well as himself. In addition, his abilities are powerful for jungling, making him a foe to be feared by all.

Trivia

 * Lifestealer's fun/alternate name in DotA was Gollum, a significant character in the Lord of the Rings book series.