Backup Holler Spider

Spider Climb. The holler spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Vigilant. If the holler spider remains motionless for at least 1 minute, it has advantage on Wisdom (Perception) checks and Dexterity (Stealth) checks.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 4 (1d4 + 2) piercing damage.

Hoot. Ranged Weapon Attack: +4 to hit, range 20/60 ft., one target. Hit: 5 (1d6 + 2) thunder damage. If the holler spider scores a critical hit, it is pushed 5 feet away from the target.

Distressed Discharge (Recharge 5-6). The holler spider releases a short, distressed cacophony in a 15-foot cone. Each creature in the area must make a DC 12 Constitution saving throw, taking 5 (2d4) thunder damage on a failed save, or half as much damage on a successful one. The holler spider is pushed 15 feet in the opposite direction of the cone.

Tune Up. When an ally within 15 feet of the backup holler spider casts a spell that deals thunder damage, the backup holler spider chooses one of the spell's targets. That target has disadvantage on the saving throw against the spell.