Spellcasting. Stilinski casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability (spell save DC 22):

Eldritch Blast, Friends, Minor Illusion, Prestidigitation, Toll the Dead, Detect Magic, Alter Self, Fly

3/day each: Banishment, Cause Fear, Dimension Door, Dispel Magic, Dominate Person, Hex, Hold Monster, Hold Person, Sending, Synaptic Static, Telekinesis, Witch Bolt, True Polymorph

1/day each: Dominate Monster, Globe of Invulnerability, Plane Shift (self +9 only)

Multiattack. Can make three attacks: Two spells of the same lvl or one lower and one weapon, or 3 weapon attacks. Can cast multiple concentration spells at the same time max 2.

Dagger. Melee or Ranged Weapon Attack: +11 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 13 (4d4+5) piercing damage.

Shortsword. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 20 (5d6+5) piercing damage.

Shortbow. Ranged Weapon Attack: +11 to hit, range 80/320 ft., one target. Hit: 20 (5d6+5) piercing damage.

Eldritch Blast. Cantrip: +11 to hit, range 300 ft., 4 count. Hit: 6 (1d10) Force damage.

Witch Bolt. Lv 5 spell: +11 to hit, Range 30 ft., one target. Duration 1min. Hit 30 (5d12) {Spell last for 5 rounds must reroll each round. Spell ends if the target moves out of range or has total coverage. Spell can be placed on new target if the primary target is unconscious} lighting damage.

Stilinski can take up to three reactions per round but only use below once per turn. Can use any other reaction up to 3 times per turn.

Counterspell: Attempt to interrupt a creature in the process of casting a spell. If the creature is casting a spell of 3rd level or lower, its spell fails and has no effect. If it is casting a spell of 4th level or higher, make an ability check using your spellcasting ability. The DC equals 10 + the spell's level. On a success, the creature's spell fails and has no effect. When casting this spell using a spell slot of 4th level or higher, the interrupted spell has no effect if its level is less than or equal to the level of the spell slot used.

Entropic Ward: Once per short rest, when a creature makes an attack roll against you, you can use your reaction to impose a disadvantage on that roll. If it misses you, your next attack roll against the creature has advantage if you make it before the end of your next turn.

Legendary Resistance (5/Day). If Stilinski fails a saving throw, he can choose to succeed instead.

Undying. Stalinski cannot be slain unless killed with his dagger. If Health is dropped to zero He will remain unconscious for 1d100 days. If killed with his dagger the killer becomes the new dark one bound to the dagger. If one kills oneself with the dagger, one can be summoned back, but at the cost of the summoner's life (The Summoner can not be resurrected).