Specters have a rage bar that fills based on the amount of damage inflicted from a single hit. This amount varies and appears to be tied to the specter's level. As it fills, the specter becomes larger and angrier. When completely filled, they begin using new attacks, with the exception of the Anemo Specter, whose suicide attack is enhanced instead.
Rifthounds have a rage bar that fills when they are struck with an elemental attack of their affinity - e.g hitting a Rockfond Rifthound with Geo causes it to accumulate rage. If the bar is completely filled, the Rifthound fights more fiercely, but their elemental resistance of that affinity drops at the same time.
The Pyro Hypostasis has a rage bar that appears whenever it is extinguished. At periodic intervals during the fight, it will conjure three Flame Seeds to reaccumulate rage. Destroying these seeds lowers the amount of rage it can accumulate. If the rage bar fills, the Pyro Hypostasis returns into its ignited state.
The Thunder Manifestation has a rage bar is present at all times during the fight. It possesses two simple attacks in its non-enraged state – thunder pylons and a burst attack. If the player steps within range of an active pylon, the manifestation slowly gains rage stacks, but these will dissipate if the player steps out of their radius. Getting hit by the burst attack will immediately fill the bar to full. The bar automatically fills to full if it reaches 75% of its health and has not been enraged yet.
The enrage state lasts permanently and a lock-on icon will appear on the player's characters as an indicator it is fully enraged. In this state, the Thunder Manifestation uses devastating attacks that deal rapid or massive damage (or a combination of both) if not dodged.