Flooze (Very Rare)

The versatility of the magically-enhanced ooze used to craft this flail can't be overstated. Its high tensile strength allows its 'chain' to stretch in response to its wearer's thoughts, while the flail's head boasts a hardness and density comparable to steel. This magic flail deals an extra 1d8 acid damage to any target it hits on each of your turns. The flail has 8 charges and regains 1d4 + 4 expended charges daily at dawn.

Reachier. While holding the flail, you can expend up to 4 charges (no action required) to increase your reach with this weapon by 5 feet for each charge expended until the end of your turn.

Sticky Fingers: When you hit a Medium or smaller creature that is holding a weapon or item with an attack using the flooze, you can choose to disarm it of one weapon instead of dealing damage to it. The target must succeed on a DC 16 Strength saving throw or let go of its item, which becomes stuck in the flail. A creature within reach of the flooze can use an action to make a DC 16 Strength check, liberating the stuck weapon on a success. Success or failure, a creature takes 1d4 acid damage when it takes this action. The flail can only hold 2 weapons at a time, and a nonmagical weapon that remains in the flail for 1 minute is completely dissolved. While the flail has weapons in it, you can choose to deal your choice of piercing or slashing damage with it on each hit, instead of the usual bludgeoning damage.

Proficiency: martial, flail Source: Heliana's Guide to Monster Hunting - Part One p. 439, Player's Handbook (2014) p. 149