Drider

When a drow shows great promise, Lolth summons it to the Demon web Pits for a test of faith and strength. Those that pass the test rise higher in the Spider Queen's favor. Those that fail are transformed into driders a horrid hybrid of a drow and a giant spider that serves as a living reminder of Lolth's power. Only drow can be turned into driders, and the power to create these creatures resides with Lolth alone.
Scarred for Life Drow transformed into driders return to the Material Plane as twisted and debased creatures. Driven by madness, they disappear into the Underdark to become hermits and hunters, either wandering alone or leading packs of giant spiders. On rare occasion, a drider returns to the fringes of drow society despite its curse, most often to fulfill some longstanding vow or vendetta from its former life. Drow fear and shun the driders, holding them in lower esteem than slaves. However, they tolerate the presence of these creatures as living representatives of Lolth's will, and a reminder of the fate that awaits all who fail the Spider Queen
Variant: Drider Spellcasting Driders that were once drow spellcasters might retain their ability to cast spells. Such driders typically have a higher spellcasting ability (15 or 16) than other driders. Further, the drider gains the Spell casting trait. A drider that was a drow divine spellcaster, therefore, could have a Wisdom of 16 (+3) and a Spellcasting trait as follows.
Spellcasting. The drider is a 7th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 14, +6 to hit with spell attacks) . The drider has the following spells prepared from the cleric spell list:

Cantrips	At Will	Poison	Spray	Thaumaturgy
1st Level	4 Slots	Bane	Detect Magic	Sanctuary
2nd Level	3 Slots	Hold Person	Silence
3rd Level	3 Slots	Clairvoyance	Dispel Magic
4th Level	2 Slots	Divination	Freedom of Movement

Drider

When a drow shows great promise, Lolth summons it to the Demon web Pits for a test of faith and strength. Those that pass the test rise higher in the Spider Queen's favor. Those that fail are transformed into driders a horrid hybrid of a drow and a giant spider that serves as a living reminder of Lolth's power. Only drow can be turned into driders, and the power to create these creatures resides with Lolth alone.

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Armor Class	19 (natural armor)
Hit Points	13d10+52
Speed	30ft.	Climb 30ft.
Strength	16 (+3)
Dexterity	16 (+3)
Constitution	18 (+4)
Intelligence	13 (+1)
Wisdom	14 (+2)
Charisma	12 (+1)
Skills	Perception d20+5	Stealth d20+9
Senses	Darkvision 120ft.	Passive Perception 15
Languages	Elvish	Undercommon
Challenge	6 (2,300 XP)
Special 1	Fey Ancestry	The drider has an advantage on saving throws against	being charmed, and magic can't put the drider to sleep.
Special 2	Innate Spellcasting	The drider's innate spellcasting ability is	Wisdom (spell save DC 13).
The drider can innately cast the following spells,	requiring no material components:
Spells 1	At will	Dancing lights
Spells 2	1/day each	Darkness	Faerie fire
Spells 3	Spider Climb	The drider can climb difficult surfaces,	including upside down on ceilings,
without needing to make an ability check.
Special 3	Sunlight Sensitivity	While in sunlight, the drider has a disadvantage on attack rolls,	as well as on Wisdom (Perception) checks that rely on sight
Special 4	Web Walker	The drider ignores movement restrictions caused by webbing
Action 1	Multiattack	The drider makes three attacks,	either with its longsword or its longbow.
It can replace one of those attacks with a bite attack
Action 2	Bite	Melee Weapon Attack	d20+6 to hit
Reach 5 ft., one creature	Hit 1d4 piercing damage	plus 2d8 poison damage
Action 3	Longsword	Melee Weapon Attack	d20+6 to hit
Reach 5 ft., one target	Hit 1d8+3 slashing damage,	or 1d10+3 slashing damage if used with two hands
Action 4	Longbow	Ranged Weapon Attack	d20+6 to hit
Range 120/600 ft., one target	Hit: 1d8+3 piercing damage	plus 1d8 poison damage