Bride of Grolantor

Grolantor's Hunger. As a bonus action, the Bride can expend a spell slot to cause her melee weapon attacks to magically deal an extra 10 (3d6) necrotic damage to a target on a hit. This benefit lasts until the end of the turn. If the Bride expends a spell slot of 2nd level or higher, the extra damage increases by 1d6 for each level above 1st.

Spellcasting. The Bride is a 7th-level spellcaster.  Her spellcasting ability is Wisdom (spell save DC 13, +5 to hit with spell attacks). The Bride has the following cleric spells prepared:

Cantrips (at will): light, sacred flame, thaumaturgy, toll the dead

1st level (4 slots): cure wounds, guiding bolt, inflict wounds, command

2nd level (4 slots): hold person, spiritual weapon, blindness/deafness, aid

3rd level (3 slots): dispel magic, spirit guardians, animate dead, meld into stone

4th level (3 slots): banishment, control water, stone shape

5th level (1 slot): holy weapon

Multiattack. The Bride makes two attacks with her morningstar.  She may substitute one attack to cast a spell.

Morningstar. Melee Weapon Attack: +9 to hit, reach 10ft., one target. Hit: 18 (3d8 + 5) piercing damage.

Channel Divinity: Destroy Undead.  Once per Short Rest.

Channel Divinity: Aura of Fear .  Once per Short Rest the Bride can can create an Aura of Fear around herself with a 20ft radius, which will terrorize creatures within the area of effect upon failing a DC 13 Wisdom saving throw.  While frightened by this effect, a creature must take the Dash action and move away by the safest available route on each of its turns, unless there is nowhere to move.  If the creature ends its turn out of sight of the Bride, it may take a Wisdom saving throw.  On a successful save, the effect ends for that creature. 

Channel Divinity: Summon Flameskull.  Once per Long Rest the Bride may summon a Flameskull into being for a duration of four hours to do her bidding.  The Flameskull owes its existence to the Bride, and it is banished when she dismisses it, she is incapacitated, or slain.