Multiattack

The kongamato makes one Beak attack and two Claw attacks.

Beak

Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage.

Claw

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage, and the target is grappled (escape DC 15) if it is a Medium or smaller creature. The kongamato has two claws, each of which can grapple only one target.

Terrifying Screech (Recharge 5-6)

The kongamato releases a screech in a 30-foot cone. Each creature in the area must make a DC 15 Constitution saving throw. On a failure, a creature takes 28 (8d6) thunder damage and is frightened until the end of its next turn. On a success, a creature takes half the damage and isn't frightened.