Fey Ancestry. The drow has advantage on saving throws against being charmed, and magic can’t put the drow to sleep.

Innate Spellcasting. The drow’s spellcasting ability is Charisma (spell save DC 11). It can innately cast the following spells, requiring no material components:

At will: dancing lights, poison spray, thorn whip, frostbite

1/day each: darkness, faerie fire

Sunlight Sensitivity. While in sunlight, the drow has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Multi-Attack: Ysvrayl makes two attacks.

Scimitar of Speed. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 11 (1d6 + 7) slashing damage. Once per turn, Ysvrayl may use a bonus action to attack with the Scimitar of Speed. 

Hand Crossbow. Ranged Weapon Attack: +9 to hit, range 30/120 ft., one target. Hit: 9 (1d6 + 5) piercing damage, and the target must succeed on a DC 14 Constitution saving throw or be poisoned for 1 hour. If the saving throw fails by 5 or more, the target is also unconscious while poisoned in this way. The target wakes up if it takes damage or if another creature takes an action to shake it awake.

CantWhip. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 8 (1D4 + 6) slashing damage. On a successful hit, use a bonus action to cast a cantrip on the attack target.