Bristleback

Trivia

 * Bristlebog has the highest intelligence gain per level of any hero whose main stat isn't intelligence.
 * In DotA, Bristlebog gained notoriety for his high effectiveness in competitive play; several high-level tournaments banned Bristlebog play entirely.
 * Bristlebog was called Bristleback in DotA. The name had to be changed in Dota 2, likely to avoid copyright issues with Blizzard, since the Bristleback exist as a Quillboar tribe in the Warcraft universe.