Cactus Mace

Weapon - uncommon

This magical weapon’s head is an enchanted cactus that rapidly regrows its missing needles. The first target hit by this weapon on each of your turns takes an extra 1d4 piercing damage from the attack.

It also sounds like rain if you turn it upside down. This item is free and is included as part of a collaboration between The Griffon's Saddlebag, It's a DnD Monster Now, and Cze & Peku. Check out the collaboration in this free post here on Patreon!