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.
 * In DotA, Bristlebog was called "Bristleback", the name of a species from Warcraft.