As the title says: When the demon outcast reduces paladin distance fighting skill, what is the animation?

Is it some kind of AOE spell? Single Target? How can I know that the Demon Outcast cast the spell and who is affected?
For example, when Walkers
Cast those Red Sparkles, it reduces all skills by quite a lot (40% - 50%)

Does the Demon Outcast have something similar to it?