Active and passive abilities in Guildrun
Guildrun heroes fight on their own once combat starts. They auto attack, build mana as they do, and spend that mana the moment their active ability is ready, which makes the ability a hero carries the thing that decides how a fight actually plays out.
Passive abilities never need mana. They tick away in the background, from flat stat gains to effects that fire on a crit, on a kill or every few attacks, and a hero can hold one of each.
Where abilities come from in Guildrun
A hero starts with the abilities on their own page, and the specialization you choose can replace or add to them. Every ability here lists what it scales from, the keywords it uses and the heroes, specializations and enemies that carry it.