Cathedral Evangelist

Undead Fortitude: If the Undead Evangelist drops to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken. On a success it drops to 1 hit point instead.

Rejuvenation: If it dies, the Undead Evangelist returns to life 1d4 days later upon the consecrated ground that it was created. Only a wish spell can prevent this trait from functioning.

Spellcasting. The Undead Evangelist  is a 9th-level spellcaster. Its spellcasting ability is [ability score] (spell save DC 15, +7 to hit with spell attacks). The Undead Evangelist has following Cleric spells prepared:
Cantrips (at will): Mending, Sacred Flame, Toll the Dead, Guidance
1st level (4 slots): Bane, Inflict Wounds, Protection From Good and Evil, Shield of Faith                        2nd level (3 slots): Blindeness/Deafness, Hold Person, Silence, Spiritual Weapon, Warding Bond      3rd level (3 slots): Animate Dead, Life Transference, Revivify, Dispel Magic, Bestow Curse, Protection From Energy                                                                 4th level (3 slots): Freedom of Movement, Stoneskin, Death Ward                                               5th level (1 slot): Flame Strike, Hold Monster, Hallow, Contagion

Multi-Attack: Undead Evangelist makes two mace attacks per turn. Or one Mace attack and one spell 

Mace. Melee Weapon Attack: +7 to hit, reach 5 ft., single target. Hit: 13 (2d8 + 3) [bludgeoning] damage.