Billy Wells

Cunning Action. On each of its turns, the spy can use a bonus action to take the Dash, Disengage, or Hide action.

Sneak Attack (1/Turn). The spy deals an extra 7 (2d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the spy that isn't incapacitated and the spy doesn't have disadvantage on the attack roll.

Spellcasting:

Cantrips: Mage Hand, Control Flames, Mold Earth

Spells(3/day): Ice Knife, Maximilian's Earthen Grasp, Absorb Elements 

Multiattack. Billy is wicked fast and can hit twice with it only feeling like he hit you once.

Dagger. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 2) piercing damage. 

Hand Crossbow. Ranged Weapon Attack: +4 to hit, range 30/120 ft., one target. Hit: 5 (1d6 + 2) piercing damage.