Fatal Sleep (11778)
 

Info
1. when sleep efect end, the victim (target) will be get a second effect is decreases Atk. Spd., Casting Spd., and Speed by 50%., but when target be attacked when sleep effect is being he will not get second effect
2. Decreases by 50% not 90%.

checked, working as describted, next time pay attention for skill level, because on the 5th level it's 90%, about the second effect, my char had the second effect.