Sneak attack. While invisible, the manducater deals a bonus 4d6 damage.

Adapt. After the same type of damage is dealt to the manducater 2 times, it gains resistance to that type of damage. After that damage is dealt 2 more times, it gains immunity.

Fire aversion. Any fire damage dealt to the manducater removes its ability to transmit the plague.

Multiattack. The manducater makes 2 claw attacks and 1 bite attack.

Savage bite. Melee Weapon Attack: +11 to hit, reach 10 ft., 1 target. Hit: 20 (2d12 + 3) piercing damage. The target needs to make a DC 12 constitution saving throw or become infected with the plague.

Claw. Melee Weapon Attack: +10 to hit, reach 15 ft., 1 target. Hit: 14 (2d10 + 3) slashing damage. 

Cloak. The manducater goes invisible. This ability has a 1 round cooldown and cannot be used if the manducater is beneath 30% HP.