Soulgrip Whip

Weapon (whip), rare (requires attunement)

This magic whip is fashioned from an Aberration’s severed tentacle and imbued with sinister magic.

When you hit with an attack roll using this whip, the target takes an extra 1d4 necrotic damage.

Cursed Coil. When you hit a creature with an attack roll using this whip, you can force it to make a DC 15 Strength saving throw. On a failed save, you grapple the target with the whip. While grappled in this way, the creature takes 1d8 necrotic damage at the start of each of its turns. In addition, whenever you take damage, the creature must succeed on a DC 15 Constitution saving throw or take half as much damage (rounded down). The creature can escape the grapple by using its action to make a DC 15 Strength (Athletics) or Dexterity (Acrobatics) check and succeeding. The grapple also ends if you use the whip to attack another creature.