False Appearance. While the vine crawler is completely motionless, it is indistiguishable from a bundled clump of thick vines.

Poison-Spike Hide. At the start of each of its turns, the vine crawler deals 3 (1d4+1) poison damage to any creature it is grappling or any creature that is grappling it unless the creature succeeds on a DC 14 Constitution saving throw.

Slapping Tendril. Melee Weapon Attack: +4 to hit, reach 10 ft., 1 target. Hit: 9 (1d8+3) bludgeoning damage and 4 (1d4+2) poison damage . 

Grasping Tendril. Melee Weapon Attack: +4 to hit, reach 10 ft., 1 target. Hit: 6 (1d6+3) bludgeoning damage plus 4 (1d4+2) poison damage and if the target is Medium or smaller it is grappled (escape DC 11). The vine crawler can have up to two creatures grappled this way at a time. 

Slam. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 12 (2d6+3) bludgeoning damage plus 6 (1d6+3) poison damage and the vine crawler must make a DC 12 Constitution saving throw or automatically lose 2 hit points.