Bone Royalty

Pile of Bones. When killed, the bone royalty's body becomes difficult terrain.

Turn Resistance. The bone royalty has advantage on saving throws against effects that turn undead.

Goblet Spellcasting. The bone royalty's spellcasting ability is Charisma (spell save DC 14). The bone royalty can innately cast the following spells, requiring no material components except for its Goblet:

3/day: Bestow Curse
1/day: Confusion

Dagger. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4+3) piercing damage.

Tempting Goblet. Ranged Spell Attack: +6 to hit, range 30 ft., one target. Hit: 10 (3d6) necrotic damage. The target must make a DC 14 Wisdom saving throw. On a failure the target has disadvantage on all attacks and saving throws for one minute or until removed by the spell Remove Curse.

Spill Goblet (Recharge 5-6). The bone royalty spills the malefic contents of its Goblet in a 10 foot radius centered on a point within 30 ft. of itself. Each creature in the area must make a DC 14 Wisdom saving throw. On a failure the target takes 21 (6d6) necrotic damage and has disadvantage on all attacks and saving throws for one minute or until removed by the spell Remove Curse. As long as this attack as to recharge, the bone royalty is unable to use it as a spell component.