Fey Ancestry. The drider has advantage on saving throws against being charmed, and magic can't put the drider to sleep.
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:
At will: dancing lights
1/day each: darkness, faerie fire
Spider Climb. The drider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Sunlight Sensitivity. While 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.
Web Sense. While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.
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 with two hands.
Longbow. Ranged Weapon Attack: +6 to hit, range 150/600 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 4 (1d8) poison damage.
Web (Recharge 5–6). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 12 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).
Multiattack. The drider makes three attacks, either with its longsword or its longbow. It can replace one of those attacks with a bite attack.
Once each turn, Antylene Baenund can summon a spider swamp at 30ft from distance of her
Once each 3 turns Antylene Baenund can cast acid splash making 1d10 of damage if successfull
Lair and Lair Actions
Antylene Baenund has a lair of square form, each side is 50 ft long
In the center of the lair there is a spider glowing picture on the floor, where spider swaps are summoned one each 2 turns when Antylene Baenund have 30% or less of Hit points
There is a throne in the center back of the room covered on spider web