Unbreathing. Bob does not need to breathe.

Spore Cloud. Bob is surrounded by a tightly compacted cloud of spores emitted by its tentacles. A creature that touches Bob or that hits it with a melee attack while within 5 feet of it must make a DC 14 Constitution saving throw. On a failure, the creature is diseased for 1 min or until cured. The diseased creature must attack 1 of Bob's slaves on their turn, If no slave is present at the beginning of that creature's turn or is attacked by Bob it can attempt a DC 14 Constitution saving throw to resist disease, for 1 turn effects of the disease are negated. If at the beginning of a creature's turn if they resisted disease last round they must make a DC 14 Constitution saving throw or again be under the full effects until the disease is cured. Cloud is dispersed on the first creature that comes into contact with it.

Probing Telepathy. If a creature communicates telepathically with Bob, they learn the creature's surface thoughts. Can only occur once per round.

Hive Mind. Any creature that Bob has enslaved, is permanently absorbed into Bob's consciousness. Bob can communicate and control any creature that it has enslaved at any distance and any plane of existence. All enslaved creatures can act independently with full autonomy, as long as it matches the will of Bob otherwise the action does not exist in the target's mind as a possibility. Upon the death of Bob, all creatures are released with full memory of everything that happened.

Legendary Resistance (2/Day). If Bob fails a saving throw, they can choose to succeed instead.

Multiattack. Bob makes three tentacle attacks, or summons 3 slaves cr 0.

Tentacle. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage. If the target is a creature is hit, it must succeed on a DC 14 Constitution saving throw or become diseased for 2 turns or until cured. The diseased creature must attack 1 of Bob's slaves on their turn, If no slave is present at the beginning of that creatures turn or is attacked by Bob it can attempt a DC 14 Constitution saving throw to resist disease, for 1 turn effects of the disease are negated. If at the beginning of a creature's turn if they resisted disease last round they must make a DC 14 Constitution saving throw or again be under the full effects until the disease is cured or time has elapsed.

Psychic Force Unarmed Strike. Melee Weapon Attack: +9 to hit, reach 5 ft. one target. Hit: 15 (3d4 + 5) bludgeoning damage.

Enslave (3/Day). Bob targets one sentient creature not in combat with it that it can see within 30 feet. The target must succeed on a DC 18 Wisdom saving throw or be magically charmed by Bob until Bob dies. The charmed target is under Bob's control but can act independently with full stats, as long as it matches the will of Bob otherwise the action does not exist in the target's mind as a possibility. This makes attempting to reason with a slave near impossible.

Bob can take 6 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Bob regains spent legendary actions at the start of its turn.

Detect.  Bob makes a Wisdom (Perception) check to perceive anything non-sentient.

Telekinesis. Bob casts Telekinesis once per day.

Magic Missle (Costs 2 actions). Bob casts Magic Missle at lvl 1.

Psychic Drain (Costs 2 Actions). One creature takes (3d6) psychic damage Wisdom save DC 14 takes half and prevents secondary effect, and Bob regains hit points equal to the damage the creature takes.

Summon Slave (Costs 6 Actions). Summons 3 enslaved creatures cr 0 from anywhere.