Centaur warrunner is a beefy hero with high STR and HPs. He is a semi-carry, initiator/ganker with great survivability, he scales well into the end game.

Centaur WR has the highest STR gain per level over any hero, and all his skills depend on stacking strength to some degree.

Pick centaur if your team is lacking in tankiness and you won`t be disappointed.