Colossal Chimera Insect

Proboscis.  The Colossal Chimera Insect can only feed on a creature after the Colossal Chimera Insect kills it with a Breath Attack, reducing its body to a puddle of enzymes.

Multiattack.  The Colossal Chimera Insect can make Three attacks: two with its Pincers and one with its Tail. Or it can use its Acid Breath.

Acid Breath. The Colossal Chimera Insect exhales acid in an 40-foot line that is 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 45 (10d8) acid damage on a failed save, or half as much damage on a successful one.

Pincer. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage. On hit the target is grappled (escape DC 18). Until this grapple ends, the creature is restrained. The Colossal Chimera Insect can grapple one creature with each Pincer.

Tail Strike. Melee Weapon Attack: +6 to hit, reach 15 ft., one target. Hit: 27 (6d6 + 6) Piercing damage. A creature hit by this attack must succeed on a DC 14 Constitution Save or be Paralyzed for (1d4 + 1) turns.

The Colossal Chimera Insect 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 Colossal Chimera Insect regains spent legendary actions at the start of its turn.

Tail. The Colossal Chimera Insect makes one Tail Strike.

Pincer. The Colossal Chimera Insect makes once Pincer attack

Song Of Death (Costs 3 Actions). The Colossal Chimera Insect chirps and chitters a sound at such a high frequency even the stone around it shakes. Every Creature within 100 feet of The Colossal Chimera Insect must succeed on a DC 18 Constitution Saving Throw or be knocked prone by the deafening sound, taking 13 (2d6 + 6) Thunder Damage or half as much on a successful save.