Potent Regeneration. The Roach has a highly specialized metabolism that enables rapid regeneration while underground. If the roach begins its turn burrowed, it regains 15 (2d8 + 6) hit points.

Vile Strain. When the Roach hits an enemy with its Acid Saliva, they must succeed on a DC 12 Constitution saving throw or have their movement speed reduced by 10 feet until the end of their next turn. If a creature's saving throw is successful, the creature is immune to this effect for the next 24 hours.

Adaptive Plating. While below half hit points, the roach gains +2 to it's AC. Due to the shifting plates, the Roach is not able to aim "up" relative to the surface it is on.  

Responsive Creep. The roach gains 10 to its speed while on creep.

Creep Nourishment. The Roach regains 7 (1d8 + 3) hit points every 1 minute if it is standing on creep and has at least 1 hit point.

Multiattack. The Roach makes two attacks, using either its claws or its acid saliva.

Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) slashing damage

Acid Saliva. Ranged Weapon Attack: +5 to hit, range 20/40 ft., one target. Hit 5 (1d6 + 2) acid damage