Web golem

Adhesive. When a creature make a melee attack against the web golem and hit they must make a DC 14 Strength check, on a failed save the target's weapon (if they are using one) is stuck to the golem and the creature has to use its action to free the weapon by repeating the check. If the creature failed the save by 5 or more the creature is restrained and stuck to the golem and can only be freed by making a DC 14 strength check with disadvantage or if the web golem takes 10 points or more of acid or fire damage. 

Web Walker. The web golem ignores movement restrictions caused by webbing.

Spider Climb. The web golem can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Immutable Form. The golem is immune to any spell or effect that would alter its form.

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

Magic Weapons. The golem's weapon attacks are magical.

Regeneration. The web golem regains 5 hit points at the start of its turn. If the web golem takes acid or fire damage, this trait doesn’t function at the start of the web golem's next turn. The web golem dies only if it starts it's turn with 0 hit points and doesn’t regenerate.

Multi attack. The web golem makes two slam attacks and a bite attack. 

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 10 (3d4 + 4) piercing damage and the target must make a DC 14 Constitution saving throw or take 15 (5d6) poison damage, half as much on a successful saving throw. 

Slam. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 14 (2d10 + 4) bludgeoning damage.