Arachnal

Keen Hearing and Smell. The arachnal has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The arachnal has advantage on an attack roll against a creature if at least one of the arachnal’s allies is within 5 feet of the creature and the ally isn't incapacitated.

Web walker. The arachnal ignores movement restrictions caused by webbing.

Web sense. While in contact with a web, the arachnal knows the exact location of any other creature in contact with the same web.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) piercing damage. Target must make a DC 11 Constitution saving throw or suffer 2d8 poison damage, halved on a successful save.

Snare.  +5 to hit.  Creature must succeed on a DC 13 Strength saving throw or be knocked prone.