Your foe's shadow writhes as it gains a malevolent will of its own. The moment the foe drops its guard, the shadow strikes.

Encounter   ✦     Shadow, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Dexterity vs. AC

Hit: 3[W] + Dexterity modifier damage. During the target's next turn, the target falls prone after moving without shifting or after making a ranged or an area attack.

Published in Dragon Magazine 379, page(s) 30.