Valam

Spellcasting. The [Valam] is a 4th-level spellcaster. Its spellcasting ability is [Wisdom] (spell save DC 16, +5 to hit with spell attacks). The [Valam] has following [Warlock] spells prepared:
Cantrips (at will): [Chill touch

Necromancy cantrip

Casting Time: 1 action
Range: 120 feet
Components: V, S
Duration: 1 round

You create a ghostly, skeletal hand in the space of a creature within range. Make a ranged spell attack against the creature to assail it with the chill of the grave. On a hit, the target takes 1d8 necrotic damage, and it can't regain hit points until the start of your next turn. Until then, the hand clings to the target.
If you hit an undead target, it also has disadvantage on attack rolls against you until the end of your next turn.
This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).],

[True strike

Divination cantrip

Casting Time: 1 action
Range: 30 feet
Components: S
Duration: Concentration, up to 1 round

You extend your hand and point a finger at a target in range. Your magic grants you a brief insight into the target's defenses. On your next turn, you gain advantage on your first attack roll against the target, provided that this spell hasn't ended.] 
1st level (4 slots): [Hellish Rebuke

1st-level evocation

Casting Time: 1 reaction, which you take in response to being damaged by a creature within 60 feet of you that you can see
Range: 60 feet
Components: V, S
Duration: Instantaneous

You point your finger, and the creature that damaged you is momentarily surrounded by hellish flames. The creature must make a Dexterity saving throw. It takes 2d10 fire damage on a failed save, or half as much damage on a successful one. At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.],

[Protection from good and evil

1st-level abjuration

Casting Time: 1 action
Range: Touch
Components: V, S, M (holy water or powdered silver and iron, which the spell consumes)
Duration: Concentration up to 10 minutes

Until the spell ends, one willing creature you touch is protected against certain types of creatures: aberrations, celestials, elementals, fey, fiends, and undead.
The protection grants several benefits. Creatures of those types have disadvantage on attack rolls against the target. The target also can't be charmed, frightened, or possessed by them. If the target is already charmed, frightened, or possessed by such a creature, the target has advantage on any new saving throw against the relevant effect.] 

2nd level (4 slots): [Hold person

2nd-level enchantment

Casting Time: 1 action
Range: 60 feet
Components: V, S, M (a small, straight piece of iron)
Duration: Concentration, up to 1 minute

Choose a humanoid that you can see within range. The target must succeed on a Wisdom saving throw or be paralyzed for the duration. At the end of each of its turns, the target can make another Wisdom saving throw. On a success, the spell ends on the target.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional humanoid for each slot level above 2nd. The humanoids must be within 30 feet of each other when you target them.],

[Darkness

2nd-level evocation

Casting Time: 1 action
Range: 60 feet
Components: V, M (bat fur and a drop of pitch or piece of coal)
Duration: Concentration, up to 10 minutes

Magical darkness spreads from a point you choose within range to fill a 15-foot-radius sphere for the duration. The darkness spreads around corners. A creature with darkvision can't see through this darkness, and nonmagical light can't illuminate it.
If the point you choose is on an object you are holding or one that isn't being worn or carried, the darkness emanates from the object and moves with it. Completely covering the source of the darkness with an opaque object, such as a bowl or a helm, blocks the darkness.
If any of this spell's area overlaps with an area of light created by a spell of 2nd level or lower, the spell that created the light is dispelled.]

3rd level (2 slots): [Gaseous form

3rd-level transmutation

Casting Time: 1 action
Range: Touch
Components: V, S, M (a bit of gauze and a wisp of smoke)
Duration: Concentration, up to 1 hour

You transform a willing creature you touch, along with everything it's wearing and carrying, into a misty cloud for the duration. The spell ends if the creature drops to 0 hit points. An incorporeal creature isn't affected.
While in this form, the target's only method of movement is a flying speed of 10 feet. The target can enter and occupy the space of another creature. The target has resistance to nonmagical damage, and it has advantage on Strength, Dexterity, and Constitution saving throws. The target can pass through small holes, narrow openings, and even mere cracks, though it treats liquids as though they were solid surfaces. The target can't fall and remains hovering in the air even when stunned or otherwise incapacitated.
While in the form of a misty cloud, the target can't talk or manipulate objects, and any objects it was carrying or holding can't be dropped, used, or otherwise interacted with. The target can't attack or cast spells.]

[Counterspell

3rd-level abjuration

Casting Time: 1 reaction, which you take when you see a creature within 60 feet of you casting a spell
Range: 60 feet
Components: S
Duration: Instantaneous

You 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.

At Higher Levels. When you cast 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 you used.]

[Dispell magic

3rd-level abjuration

Casting Time: 1 action
Range: 120 feet
Components: V, S
Duration: Instantaneous

Choose one creature, object, or magical effect within range. Any spell of 3rd level or lower on the target ends. For each spell of 4th level or higher on the target, make an ability check using your spellcasting ability. The DC equals 10 + the spell's level. On a successful check, the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you automatically end the effects of a spell on the target if the spell's level is equal to or less than the level of the spell slot you used.]

4th level (1 slots): [Blight

4th-level necromancy

Casting Time: 1 action
Range: 30 feet
Components: V, S
Duration: Instantaneous

Necromantic energy washes over a creature of your choice that you can see within range, draining moisture and vitality from it. The target must make a Constitution saving throw. The target takes 8d8 necrotic damage on a failed save, or half as much damage on a successful one. This spell has no effect on undead or constructs.
If you target a plant creature or a magical plant, it makes the saving throw with disadvantage, and the spell deals maximum damage to it.
If you target a nonmagical plant that isn't a creature, such as a tree or shrub, it doesn't make a saving throw; it simply withers and dies.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.]

Dark Edge. Melee Weapon Attack: +3 to hit, reach 10 ft., 10+ target. Hit: 1 (4d6 + 6) [necrotic] damage. 

Black Ray. RangedWeapon Attack: +6 to hit, range 30/60 ft., 1 target. Hit: 1 (5d4) + [necrotic] plus (1d4+5) [poison] damage.

The Valam gets one Legendary per round.

Arcane repose (Costs all Actions). Regain 2d4 spell

Shadow Form(Costs 1 bonus Action). Immune to all damage from all nonmagical sources until its next turn.

Deflect (Costs 1 reaction).  Deflect any nonmagical attack, if the attack is magical make a second ac check with disadvantage.