Catchkey, the Possessed

Sneak Attack: Once per turn, you can deal an extra 5d6 damage to one creature you hit with an attack with a finesse or ranged weapon if you have advantage on the attack roll. You don’t need advantage on the attack roll if another enemy of the target is within 5 ft. of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll.

Wails from the Grave: Immediately after you deal your Sneak Attack damage to a creature on your turn, you can target a 2nd creature that you can see within 30 ft. of the 1st creature and it takes 3d6 necrotic damage. 

Catchkey can use this ability 5 times per day plus once for every soul token he expends

Evasion: When you are subjected to an effect that allows you to make a DEX saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail

Tokens of the Departed: As a reaction when a creature Catchkey can see dies within 30 feet of him,  he can catch a portion of their soul and create a soul trinket.  He can have a maximum of 4 at any time and starts with 3 in his possession.  He likes to torment them.   He can expend one to use his wails from the grave feature if he has exhausted his normal charges

While he has at least one soul trinket on his person he has advantage on Constitution saving throws. 

Crossbow Expert- Catchkey ignores the loading property of crossbows with which he is proficient. Being within 5 ft. of a hostile creature doesn’t impose disadvantage on his ranged attack rolls, and when he uses the Attack action and with a one-handed weapon, he can use a bonus action to attack with a hand crossbow he is holding.

Halfling Nimbleness: You can move through the space of any creature that is of a size larger than yours.

Naturally Stealthy: You can attempt to hide even when you are obscured only by a creature that is at least one size larger than you.

Telekinetic Thrust.  Catchkey targets a creature or unattended object within 30 feet of it. A creature must be Medium or smaller to be affected by this magic, and an object can weigh up to 150 pounds.

If the target is a creature, Catchkey makes a Charisma check contested by the target’s Strength check. If Catchkey wins the contest, Catchkey hurls the target up to 30 feet in any direction, including upward. If the target then comes into contact with a hard surface or heavy object, the target takes 1d6 damage per 10 feet moved.

If the target is an object that isn’t being worn or carried, Catchkey hurls it up to 30 feet in any direction. Catchkey can use the object as a ranged weapon, attacking one creature along the object’s path (+8 to hit) and dealing 9 (2d4+4) bludgeoning damage on a hit.

Fade: As an action, Catchkey can turn invisible as with the invisibility spell but with no verbal, somatic or material components 

+1 Shortsword. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 11 (1d6 + 7) piercing damage. 

+1 Hand Crossbow. RangedWeapon Attack: +12 to hit, range 30/120 ft.,  one target. Hit: 11 (1d6 + 7) piercing damage.

Dual-wielder.  When Catchkey takes the attack action with his shortsword on his turn, he may use his bonus action to make an attack against another target with his hand crossbow.  This attack does not suffer disadvantage if he is in melee

Cunning Action:  On each of his turns in combat, Catchkey can use a bonus action to take the Dash, Disengage, or Hide actions.

Uncanny Dodge: When an attacker that you can see hits you with an attack, you can use your reaction to halve the attack’s damage against you.

Create Soul Trinket: As a reaction when a creature you can see dies within 30 feet of you, you can open your free hand and cause a Tiny trinket to appear there, a soul trinket.