Braidley

Shapeshifter.  Braidley can take two shapes, Magic Rope and Rope Dog. 

Magic Rope.  While in the Magic Rope form, Braidley becomes a magic rope that is 120 ft in length.  This magic rope has the same AC and HP as Braidley.  While in this form, Braidley's speed becomes 0.  This Magic Rope can be used as an item.

Rope Dog. Braidley has grown in his wisdom as he has joined his companion in many adventures.  Braidley has full sentience and is aware of his surroundings.  While awakened, Braidley acts on his own, and will obey the commands of his companion.  Braidley's speed becomes 40 ft in this form. As a bonus action, his companion can issue any command to Braidley in the Actions section.  During Combat, unless told otherwise, Braidley will take the dodge action as a default action.  Braidley acts on the same initiative order as his companion, but after his companions turn.  

Arcane Slumber. Braidley can only be awake for a maximum of 24 hours.  After which, he must enter his Arcane Slumber for a full 8 hours to recharge. As a bonus action, Braidley's companion can awaken him from his arcane slumbering, or put him to sleep.

Limber. Braidley cannot be grappled or restrained.

Blindsense.  Braidley does not require eyesight to sense its surroundings.  Has advantage on all Perception checks that rely on hearing.  Has disadvantage on all Perception checks that require sight.

Form Change. As an Action, Braidley can change into Magic Rope or Rope Dog.

Multiattack. (Rope Dog form only). The Rope Dog form makes two attacks, one with the Bite and one with the Claw, or one Wrap attack.

Bite. (Rope Dog form only). Melee Weapon Attack. +5 to hit, 1 target, reach 5 ft.  Hit: 5 (1d6+3) piercing damage.  Damage is magical for the purposes of overcoming resistance.

Claw. (Rope Dog form only). Melee Weapon Attack. +5 to hit, 1 target, reach 5 ft. Hit: 5 (1d6+3) slashing damage.  Damage is magical for the purposes of overcoming resistance.

Wrap. (Magic Rope form only) Melee Weapon Attack. The Magic Rope wraps around a Large or smaller creature.  The creature must succeed on a DC 14 Str saving throw or take 1d4 bludgeoning damage and be grappled.  The creature can repeat the check as a bonus action at the beginning of each of their turns.  While grappled, a creature is considered restrained.