Beta(Derik)

Observant. Beta(Derik) has +5 to perception and investigation checks, and it can read lips.

Sneak Attack(1/round). Beta(Derik) deals an extra 17 (5d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, when the target is within 5 feet of an ally of Beta(Derik) that isn't incapacitated, or if Beta(Derik) is with 5 feet of a target with no other enemies with 5 feet, and Beta(Derik) doesn't have disadvantage on the attack roll.

Innate Spellcasting. Beta(Derik)'s innate spellcasting ability is Intelligence (spell save DC 18, +10 to hit with spell attacks). Beta(Derik) has the following spells prepared, requiring no material components:

(At will): Message, mage hand, friends, mind sliver (3d6)

3/day: Detect Thoughts, Sending, Scrying, Lightning Bolt (5th level) 

2/day: Synaptic Static, Magic Weapon (+2)

1/day: Psychic Crush, Creation

Adamantine Cane Sword (+2). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 25 (6d6 + 4) slashing damage. 

Parry. Beta(Derik) adds 4 to its AC against one melee attack that would hit it. To do so, Beta(Derik) must see the attacker and be wielding a melee weapon.

Legendary Actions. The Beta(Derik) can take 3 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. Beta(Derik) regions spent legendary actions at the start of its turn.

Move. Beta(Derik) can move up to its normal movement speed without provoking opportunity attacks.

Attack. Beta(Derik) can make a melee weapon attack against a creature in range. 

Cast a spell. (Costs 2 Actions). Beta(Derik) casts a spell.