Actions

Multiattack. The drider makes three attacks, either with its longsword or its longbow. It can replace one of those 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 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.   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 Spellcasting 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

Suggested Environments

Underdark