Xill Commander

Pack Tactics. The xill has advantage on attack rolls against a creature if at least one of the xill's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The xill makes two attacks with its shortswords and two attacks with its claws. It can replace one of its claw attacks with a bite attack. Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) piercing damage. The target must succeed on a DC 14 Constitution saving throw, or become poisoned for 1 hour. The target is  aralyzed while poisoned in this way.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) slashing  damage.

Shortsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing damage.

Planeswalk. The xill and anything it is wearing or carrying enters the Border Ethereal from an adjacent plane, or vice versa. It can carry one creature that is willing or it is grappling with it. If the target is unwilling, it must succeed on a DC 13 Charisma saving throw to avoid going with the xill.

Implant Eggs (1/Day). The xill targets an incapacitated creature within 5 feet of it. The target must succeed on a DC 14 Constitution saving throw or contract a disease
—xill eggs. The eggs hatch within 24 hours of being implanted and then start to eat their way through the host. The host's hit point maximum is reduced by 1d8 every hour after the eggs hatch. If this damage reduces the target's hit point maximum to 0, the target dies and
the xill young chew their way out of the host's chest, killing the host in the process. The xill young then planeswalk to the Ethereal Plane. If the disease is cured before the young emerge, the xill are disintegrated.

Leadership (Recharges after a Short or Long Rest). For 1 minute, the xill can utter a special command or warning whenever a nonhostile creature that it can see within 30 feet of it makes an attack roll or a saving throw. The creature can add a d4 to its roll provided it can hear and understand the xill. A creature can benefit from only one Leadership die at a time. This effect ends if the xill is incapacitated.