Awakened Mangrove

False Appearance. While the tree remains motionless, it is indistinguishable from a normal mangrove tree.

Multiattack. The awakened mangrove can make two root tentacle attacks.  One of them can be replaced with Fling.

Root Tentacle. Melee Weapon Attack: +5 to hit, reach 15 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage. If the target is a creature, it is grappled (escape DC 16). Until this grapple ends, the target is restrained.  The mangrove can have up to four creatures restrained at a time.

Fling. One Medium or smaller object held or creature grappled by the mangrove's tentacles is thrown up to 60 feet in a random direction and knocked prone. If a thrown target strikes a solid surface, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 16 Dexterity saving throw or take the same damage and be knocked prone.