Awakened Cactus

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

Thorny Exterior.  Any creature who grapples or attempts to grapple the cactus takes 1d6 piercing damage.  A creature who begins its turn grappling or grappled by the cactus, takes 1d6 piercing damage.

Succulent.  The cactus is resistant to any damage that is caused by drawing moisture from it, such as the Blight spell.

Fruit of Plenty.  The cactus has between 1 and 6 fruit growing from its body.  If given willingly by the cactus, the fruit has the properties of a goodberry.   If taken without being offered, it is poisonous; ten minutes after consuming the fruit, a creature must make  a DC16 Constitution saving throw.  A creature who fails its saving throw will suffer 4 (1d6 + 1) poison damage poison damage and will gain one level of exhaustion.  A creature who succeeds the saving throw takes no damage and does not gain a level of exhaustion.  Creatures immune to poison automatically succeed the saving throw.

Multiattack.  The cactus can make Slam attacks.  It can choose to replace one of those Slam attacks with the Hug of Woe.

Slam. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage and 7 (1d6 + 4) piercing damage.

Hug of Woe.  The Cactus makes a grapple attack against an opponent.  +6 to hit, reach 10 ft., one target.  If successfully grappled, the target takes 11 (2d6+4) piercing damage.  A creature grappled by the cactus is restrained.  The target can use an action to attempt to escape (DC14).  A creature that starts its turn grappled by the cactus takes 3 (1d6) piercing damage

Thorny Defense.  After taking damage from a melee attack within its reach, the Cactus can use its reaction to take an opportunity attack against the attacker.