Mass Hysteria

Mass Hysteria is a Nightblade Class skill, found in the Shadow Skill Line. A crowd control ability that fears enemies.

Mass Hysteria
3780 Instant Cast Target: Area Base Skill: Aspect of Terror
Summon a dark spirit to terrify all nearby enemies, causing them to cower in fear for 3 seconds and be afflicted with Major Cowardice for 10 seconds, reducing their Weapon and Spell Damage by 430.

Mass Hysteria is a morph of the Aspect of Terror base skill. The other morph is Manifestation of Terror.