You are affected by:Skill: 'shadowdrain' modifies moves by -29 for -1 hours.Skill: 'shadowdrain' modifies mana by -29 for -1 hours.Skill: 'shadowdrain' modifies hp by -29 for -1 hours.Should it really be -1 hours?
You need to kill the shadow that drained you (or die) to cure it.