Grasping Tendrils

The creature can have up to six tendrils at a time. Each tendril can be attacked (AC 20; 10 hit points; immunity to poison and psychic damage). Destroying a tendril deals no damage to the creature, which can extrude a replacement tendril on its next turn. A tendril can also be broken if a target takes an action and succeeds on a Strength check (DC = 8 + proficiency bonus + Strength modifier) against it. (Roper, pp. 261, MM)