Vincent the Vine Monster

Spider Climb. Vincent can move up, down, across vertical surfaces and upside down along ceilings while leaving four of his vines free for attacks

 Absorbtion. Whenever Vincent is subject to cold damage he regains hit points equal to the cold damage, this includes cold damage done by water (1 cold damage per gallon of water)

Multiattack. Vincent the Vine Monster makes four attacks with it's vines. If it has a target grappled, Vincent can replace 1 of his vine attacks with a fling attack.

Vine. Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 2d8 + 6 piercing damage + 1d8 cold damage. On a hit, a large or smaller target is  grappled, escape DC 15

Fling. Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 16 (3d6 + 6) bludgeoning damage.

Fling. Vincent can fling a target up to 40ft, the target takes 1d6/10 feet flung +6 bludgeoning damage and landing prone. If the target strikes another creature, the creature must make a DC 15 Dex saving throw taking (1d6/10 feet flung) +6 bludgeoning damage and being knocked prone on a failure.