Frequency: Always

Character Name: Dreamers

Race: M Hume

World: Valefor

Main Job: Any that can equip Twilight Knife

Area and Coordinates: Any

Party or Solo: any

Monster Name: Any Undead mob

Steps:
When fighting most mobs, the additional effect of HP/MP/TP drain seems to work properly. When fighting any undead mob, the additional effect has never taken place.

I can understand the added effect of HP Drain not taking place on undead monsters, but since the spells Aspir, MP Drainkiss, and Absorb-TP will work on undead, I would expect the added effects of mp and tp drain from the twilight knife to also work occasionally.