Multiattack

The drider makes a claws attack and then either a bite or longsword attack. Alternatively it makes two longbow attacks.

Claws

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage and the target is grappled (escape DC 15). While grappling a target the drider can't attack a different target with its claws.

Bite

Melee Weapon Attack: +6 to hit, reach 5 ft., one grappled creature. Hit: 2 (1d4) piercing damage plus 13 (3d8) poison damage.

Longsword (wielded two-handed)

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) slashing damage.

Longbow

Melee Weapon Attack: +6 to hit, range 120/600 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 7 (2d6) poison damage.