Death occurs when a hero takes sufficient enough damage to be reduced to zero health. Heroes that die will be revived after the respawn timer runs out. The higher level the hero is, the longer it takes for the hero to respawn. During that time, they are incapacitated, only able to view the battlefield. However, they can still control their hero-controlled units. It is possible to buy yourself back (instant revival) for a certain amount of gold with your Circle of Power. The higher level the hero is, the more gold is required to use Buyback. This feature has a 5 minute cooldown. The price for instant revival also increases steeply as the game progresses.
Upon death, heroes lose some of their gold, which their enemy gains. Heroes lose more gold if they are on a killing streak and their killer gains more gold. Each hero has a different death animation.