Multiattack

Animate Severed Head then 2 of either Axes.

Bearded Axe

Melee Weapon Attack: +8 to hit, 5 ft., one target, 12 (2d6+5) slashing damage + 9 (2d8) necrotic.

Throwing Axes

Ranged Weapon Attack: +8 to hit 5 ft. or range 20/60' one target 8 (1d6+5) slashing damage + 9 (2d8) necrotic.

Animate Severed Head

Pulls head from its belt and commands head to fly to target executioner can see within 30'. Head does so and attaches to it by biting. While head is attached creature has vulnerability to necrotic and at start of each of executioner's turns each attached head: 5 (2d4) piercing damage to that creature. Spellcaster with head attached has disadvantage on Con saves to maintain concentration. Executioner can have at most 4 heads attached to creatures at a time. A creature including target can use action to detach head. Detached head flies back to executioner up to 30'/round.