Basilica Priest

Purge the Profane. As a bonus action, the priest can expend a spell slot to cause its melee weapon attacks to magically deal an extra 9 (2d8) radiant damage to a target on a hit and the Priest regains hit points equal to half the amount rolled. This benefit lasts until the end of the turn. 

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

Cantrips (at will): light, sacred flame, thaumaturgy

1st level (4 slots): cure wounds, ray of sickness, sanctuary

2nd level (3 slots): lesser restoration, blindness/deafness

3rd level (2 slots): dispel magic, vampiric touch

Dark Staff. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage and the priest regains hit points equal to half of the amount rolled.