Multiattack

The spider of Leng makes two Claw attacks and one Staff of Leng attack, or it makes three Spit Venom attacks.

Claw

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 3) slashing damage plus 4 (1d8) poison damage.

Staff of Leng

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 3) bludgeoning damage plus 7 (2d6) psychic damage, and the target must succeed on a DC 15 Wisdom saving throw or be stunned until the end of is next turn.

Spit Venom

Ranged Weapon Attack: +6 to hit, range 20/60 ft., one target. Hit: 16 (3d8 + 3) poison damage, and the target must succeed on a DC 15 Constitution saving throw or be poisoned and blinded until the end of its next turn.

Spellcasting

The spider of Leng casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability (spell save DC 15): At will: comprehend languages, detect magic 3/day each: confusion, silence 1/day each: arcane eye, hypnotic pattern