The blue bar under your Hero's Health. When full, click your hero so they can perform their ultimate Active ability (1st skill). Rage carries over between waves and the Gauntlet but not stages or levels.
How a Hero gains Rage
- Being attacked by a physical hit or magical hit
- Being attacked by an ability or skill
- Dealing damage through an ability or auto-attack
- Rage Regen grants this after each wave
- Prometheus' 2nd skill "Bad Buddy". Amount based on skill's level.
- Dealing the killing blow
How a Hero loses Rage
- Using your Hero's Active ultimate skill
- Astraea's 3rd skill "Condemnation" targets Front and Mid Heroes. Rage lost based on the skill's level.
- Medusa's 3rd skill steals a flat amount of Rage from all heroes hit. Rage lost based on the skill's level.