Drider

Drider CR: 6

Large monstrosity, chaotic evil

Armor Class: 19 (natural armour)

Hit Points: 123 15d10+52

Speed: 30 ft , climb: 30 ft

STR

16 +3

DEX

16 +3

CON

18 +4

INT

13 +1

WIS

14 +2

CHA

12 +1

Skills: Perception +5, Stealth +9

Senses: Darkvision 120ft, passive Perception 15

Languages: Elvish, Undercommon

Challenge Rating: 6

Innate Spellcasting: as detailed below except can do these even if not an actual spellcaster. They can cast at will - Dancing Lights, and once per day - Darkness, Faerie Fire. These require no components.

Some Driders are spellcasters. In this cast the drider is a 7th level spellcaster. It's spellcasting ability is Wisdom (spell save DC 14, +6 to hit with spell attacks). It can cast the following 4 times a day:
1st level spells: Bane, Detect Magic, Sanctuary.

At will: Cantrips: Poison Spray, Thaumaturgy.

2/day: 4th level: Divination, Freedom of Movement.

3/day: 2nd level: Hold Person, Silence.
3rd level: Clairvoyance, Dispel Magic.

Fey Ancestry: The drider has advantage on saving throws against being charmed, and magic can't put the drider to sleep.
Innate Spellcasting: see above.
Spider Climb: The drider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Sunlight Sensitivity: When in sunlight, the drider has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.
Web Walker: The drider ignores movement restrictions caused by webbing.

Actions

Multiattack: The drider makes three attacks, either with it's longsword or it's longbow. It can replace one of these attacks with a bite attack.
Bite: Melee Weapon Attack +6 to hit, reach 5 ft, one creature. Hit 2 1d4 piercing damage plus 9 2d8 poison damage.
Longsword: Melee Weapon Attack +6 to hit, reach 5 ft, one target. Hit 7 1d8+3 slashing damage, or 8 1d10+3 slashing damage if used two-handed.
Longbow: Ranged Weapon Attack +6 to hit, range 150/600 ft, one target. Hit 7 1d8+3 piercing damage plus 4 1d8 poison damage.

Driders are half Drow, and half spider. The top half is the Drow part, and from the waist down is a large black spider.

Suggested Environments

Usually found in the Underdark, or part of a Drow raiding party / war host on the surface.