Blood drinker roses

False appearance: unless the roses are moving, they appear as normal rose bushes.

Blood drinker: Once per turn, when the roses have a creature grappled, they can deal (1d4) necrotic damage to that creature. The roses heal damage equal to the necrotic damage dealt. The target's maximum hit point is reduced by the necrotic damage till their next long rest.

Scent of blood: The roses are drawn to the scent of blood, burning strong incense when camping in areas where the roses flower will prevent them from detecting the individual. The roses have an advantage on targets below half-hit points.

Multiattack. 2 lash attacks or 1 lash attack & 1 weakening resonate

Lash. Melee Weapon Attack: +3 to hit, reach 10 ft., 1 target. Hit: 7 (2d4 + 1) slashing damage. If the target is a creature, it must make a DC 14 Strength or Dexterity saving throw or be grappled. A creature can repeat the save as an action to free itself. A creature within 5ft of the grappled creature can make an attack roll against the vine, which has an AC of 15, and if it takes more than 10 slashing damage, the grappled creature is no longer grappled. 

Weakening resonates. The roses begin to hum with a horrific resonance; all creatures within 60ft must make a DC 14 Strength saving throw. On a success, the target movement is reduced by 10ft on a failure, the target is knocked prone.