Tendril of Arixmethes

Wondrous item, rare Price: 800-1,200 gp | low sentimentality

This tendril came from the mouth of a slumbering kraken and flops around angrily. It has 60 hit points and 17 AC. You can spend 5 minutes stroking it softly while whispering a password to it until it falls asleep and becomes inert. You can then affix the tendril to any surface. When a creature comes within 5 feet of the tendril, it must say the password within 6 seconds or the tendril awakens and lashes out, dealing 1d6 bludgeoning damage if the creature fails a DC 14 Dexterity saving throw to dodge the attack. The tendril stops attacking when someone speaks the password within 30 feet of it.

Paid

A creature struck by the tendril must succeed a DC 16 Strength saving throw or become restrained by the tentacle. The creature can repeat the saving throw at the start of its next turn, freeing itself on a success or remaining restrained and suffering another 1d6 bludgeoning damage on a failure. The tendril releases a creature it’s restraining if someone speaks the password within 30 feet of it. While the tendril is restraining a creature, it can’t attack or restrain another creature.

Overpaid

With the tendril in hand, you can use an action to focus on the tendril and sense the direction of Arixmethes the kraken.

Source: The Gray Merchant of Asphodel