Context for those unfamiliar with DOTA 2: The guy on the horse is Abbadon, a support hero has an ultimate that turns all damage into healing when he gets below 400 hp. The blue thing over him is Aghanim's Scepter, an item that improves or adds abilities. In Abba's case, his ultimate now heals everyone near him for 70-90% of the damage they receive ON TOP of whatever armor and magic resistance they've already had, and he keeps his immortality. Good luck killing anyone under its effect if you can't one-shot or don't have some strong antiheal on your team.