Shade, the Coffin Nail [CARD] (Patreon)

Weapon (rapier), rare (requires attunement)

You gain a +1 bonus to attack and damage rolls made with this magic weapon. While sheathed, this weapon is indistinguishable from an ordinary cane. A creature must succeed on a DC 16 investigation check to discern its true nature. This weapon has a number of charges equal to half your proficiency bonus rounded down and regains all charges daily at dusk.

Shadow Tag. When you hit a creature with this weapon, you can spend a charge to forgo the damage and instead target the creature's shadow with this magic weapon. If you do, the target becomes restrained while this sword is pinning its shadow. The restrained creature can use an action to make a DC 16 athletics check to break free, suffering 2d6 necrotic damage on a failure, half as much on a success as the creature tears its shadow from the weapon. While this ability is active you cannot make attacks with this weapon and the ability ends if you let go of the weapon or it is removed from the ground. You can remove the blade from a shadow it is pinning as a free action, freeing the creature from being restrained. This feature cannot be used if there is no light to cast the target’s shadow.

An elegant but unassuming cane to the untrained eye, this blade conceals a sinister nature. Skirting the edge of this world and the realm of darkness, it pierces into the target’s shadow, pinning them to the spot. Any fear its victims feel is only temporary, as a quick death is sure to follow.