Skewer

Ryoko's Guide to the Yokai Realms
Loot Tavern

In a thrusting strike, you attempt to skewer an enemy with your weapon. Make an attack roll against a creature within your reach. On a hit, the target suffers the attack’s normal effects and is also grappled by you. This grapple ends early if you use the weapon to make another attack or you let go of the weapon. When the grapple ends, the creature takes piercing damage equalling a number of d8s equal to your proficiency bonus.