Anubian Reaver

The soldier has Advantage on an Attack roll against a creature if at least one of the gnoll's allies is within 5 feet of the creature and the ally isn't incapacitated.

Once per turn, the soldier can deal an extra 7 (2d6) damage when it hits a target with a weapon Attack and has Advantage on the Attack roll.

The Reaver can take the Dash action as a bonus action on each of its turns.

The soldier makes two melee weapon attacks.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 3) Slashing damage or 16 (3d8 + 3) Slashing damage if the reaver has half of its Hit Points or fewer. If this Attack reduces a creature to 0 Hit Points, the Reaver gains 10 Temporary Hit Points.