The guy with the furry collar was right.
- (Mobs on Floor): Speed -40% / 60%
- Duration: 8
- Cooldown: 3
Heroes with skill: Kreyang (lvl 3/12)
Despite doing no damage by itself, it effectively amplifies the effects of all other attacks on the floor by giving them more time to deal damage. Putting the equivalent of two Neurostuns in every room is almost always devastating to a wave, not to mention that the effects stack with already-existing Neurostuns and other slowing skills. It's potentially the most useful active ability during the crystal run - few monsters can catch a crystal carrier while under such a severe slow effect.