Being the personal weapon of Kris, the Blade of Shadow act like an enhanced Slaying Edge, with more might. It's unique atribute happens either if his foe is with full HP or on enemy phase, whereas Kris's penalties are nullified and the foe is debuffed by 5 points to all stats during combat.
Blade of Shadow
Accelerates Special trigger (cooldown count-1). If foe initiates combat or if foe's HP = 100% at start of combat, neutralizes penalties on unit and inflicts Atk/Spd/Def-5 on foe during combat.