Captain Svaurgen

Magic Resistance. Captain Svaurgen has advantage on saving throws against spells and other magical effects.

Sea Legs. Captain Svaurgen has advantage on ability checks and saving throws to resist being knocked prone.

Innate Spellcasting (Psionics). Captain Svaurgen’s innate spellcasting ability is Intelligence (spell save DC 18). He can innately cast the following spells, requiring no components:

At will: detect thoughts, levitate, incite greed (his crystal cutlass acts as the gem)

1/day each: dominate monster, plane shift (self only)

Multiattack: Captain Svaurgen makes two attacks: one with his crystal cutlass, and one with either his tentacles or his extract brain.

Crystal Cutlass. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 8 (1d8 + 4) slashing damage plus 14 (4d6) psychic damage.

Tentacles. Melee Weapon Attack: +10 to hit, reach 5 ft., one creature. Hit: 20 (3d10 + 5) psychic damage. If the target is Medium or smaller, it is grappled (escape DC 18) and must succeed on a DC 18 Intelligence saving throw or be stunned until this grapple ends.

Extract Brain. Melee Weapon Attack: +10 to hit, reach 5 ft., one incapacitated humanoid grappled by the mind flayer. Hit: The target takes 55 (10d10) piercing damage. If this damage reduces the target to 0 hit points, the mind flayer kills the target by extracting and devouring its brain.

Mind Blast (Recharge 5–6). The mind flayer magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on a DC 18 Intelligence saving throw or take 27 (5d8 + 5) psychic damage and be stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.