Ankheg Queen

Multiattack. The ankheh queen makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage plus 6 (2d6) acid damage. If the target is a Large or smaller creature, it is grappled (escape DC 16). Until this grapple ends, the ankheg queen can bite only the grappled creature and has advantage on attack rolls to do so.

Claws. Melee Weapon Attack: +7 to hit, reach 15 ft., one target. Hit: 13 (2d8 + 4) slashing damage

Acid Spray (Recharge 6). The ankheg queen spits acid in a line that is 30 feet long and 5 feet wide, provided that it has no creature grappled. Each creature in that line must make a DC 16 Dexterity saving throw, taking 12(4d6) acid damage on a failed save, or half as much damage on a successful one.