Brute. A melee weapon deals one extra die of its damage when the warchief hits with it (included in the attack).

Chameleon Skin. The troglodyte has advantage on Dexterity (Stealth) checks made to hide.

Stench. Any creature other than a troglodyte that starts its turn within 5 feet of the troglodyte must succeed on a DC 12 Constitution saving throw or be poisoned until the start of the creature’s next turn. On a successful saving throw, the creature is immune to the stench of all troglodytes for 1 hour.

Sunlight Sensitivity. While in sunlight, the troglodyte has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight. 

Multiattack. The troglodyte chieftain makes three attacks; two with its claws and one with its bite; two with its battleaxe and one with a claw or bite; or three with its cave darts. It can attack with a cave dart instead of any of its melee attacks.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) piercing damage.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) slashing damage.

Battleaxe. Melee Weapon Attack: +6 to hit, one target. Hit: 13 (2d8 + 4) slashing damage, or 15 (2d10 + 4) slashing damage if used with two hands.

Cave Dart. Ranged Weapon Attack: +6 to hit, range 30/120 ft., one target. Hit: 11 (1d10 + 6) piercing damage.

Command Stink. A troglodyte chieftain can release an indescribable stench as a free action. Any creature other than a troglodyte that starts its turn within 60 feet of the chieftain must succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns. On a successful saving throw, the the creature gains temporary immunity to the stink attacks of all troglodytes with the same or fewer Hit Dice than the troglodyte chieftain. This immunity lasts until 1 hour after the encounter ends.

The command stink alerts any nearby troglodytes and can convey up to five words of information (such as "Blackclaws outflank; Rottentails throw darts!", "Warchief Smoothnose, withdraw to ambush!"). In still air other troglodytes can smell it from 150 feet away, but wind currents can increase or decrease this distance.