Martial Advantage. Once per turn, Grunka can deal an extra 7 (2d6) damage to a creature it hits with a weapon attack if that creature is within 5 feet of an ally of the hobgoblin that isn't incapacitated.

Longsword. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit:5 (1d8 + 1) slashing damage, or 6 (1d10 + 1) slashing damage if used with two hands.

Longbow. Ranged Weapon Attack: +3 to hit, range 150/600 ft., one target. Hit:5 (1d8 + 1) piercing damage.

Acid Spray Gun (Recharge 5–6). The hobgoblin sprays acid in a 10-foot cone. Each creature in the area must make a DC 10 Dexterity saving throw, taking 7 (2d6) acid damage on a failed save, or half as much damage on a successful one.

The spray gun has a tank that can be filled with ten standard vials of acid mixed with water, allowing it to be used five times.