Bone-Pulverizer (5e Equipment)
From D&D Wiki
Weapon (Heavy Flail), Legendary
From the makers of WackTech™ Studios, this bowling ball attached to a stick and tied all together with a rope is kid tested and parent approved to smash your enemies to bits! Simply grab the stick and swing, ITS THAT EASY!
This weapon deals 3d8 extra bludgeoning damage, if the creature is a construct or an undead they take 5d8 damage extra instead.
STRIKE! Once per day you may take the attack action and attempt to hit all creatures in a 10 foot radius making one attack roll for all targeted creatures.
SPARE! On a critical hit with this weapon, you may make an additional attack against the original target or against a creature within 10 feet of the original target.