Centimaw

Legendary Resistance (3/Day). If the centimaw fails a saving throw, it can choose to succeed instead.

Multiattack. The centimaw can use its Frightful Presence. It then makes three attacks: two with its ground pound and one with its shredding maw.

Shredding Maw Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 21 (2d10 + 10) piercing damage plus 14 (4d6) slashing damage.

Ground Pound. Melee Weapon Attack: +17 to hit, reach 20 ft., one target. Hit: 19 (2d8 + 10) bludgeoning damage.

Frightful Presence. Each creature of the Centimaw's choice that is within 120 feet of the Centimaw and aware of it must succeed on a DC 21 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the Centimaw's Frightful Presence for the next 24 hours.

The centimaw can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The centimaw regains spent legendary actions at the start of its turn.

Echolocation. The centimaw makes a Wisdom (Perception) check.

Ground Pound. The centimaw makes a ground pound attack.

Shriek (Costs 2 Actions). The centimaw releases a piercing shriek from its throat, blasting the eardrums of everyone nearby. Each creature within 60 feet of the Centimaw must succeed on a DC 22 Constitution saving throw or take 17 (2d6 + 10) true damage and be knocked incapacitated for one turn.