Dragon Slayer is a basic Constitution ability unlocked by consuming a Dragon Slayer ability codex. When used, all damage against dragons is increased by 15% for 10 seconds (17 ticks).
The ability does not generate nor consume adrenaline, and deals no damage. It can be used during, and does not incur, the global cooldown. The ability has no animation. The damage increase from the Dragon Slayer ability affects damage over time abilities that have a bleed effect i.e. Dismember, Combust, etc.
This ability replaced the dragon slayer sigil on 19 August 2019 when the sigil slot was removed. The ability costs twice as much to unlock as the sigil did, but the ability requires no upkeep, and can be used with other sigil abilities, unlike the degradable sigil.
The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!