Weeping Angel

Spellcasting. The Weeping Angel is an 8th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 15, +7 to hit with spell attacks). The Weeping Angel has following Cleric Spells prepared:

Cantrips (at will): Thaumaturgy, Sacred Flame (3d8), Spare the Dying
1st level (4 slots): Guiding Bolt, Command
2nd Level (3 slots): Spiritual Weapon, Hold Person
3rd Level (3 slots): Spirit Guardians, Animate Dead
4th Level (2 slots): Banishment, Death Ward*

*The Weeping Angel casts Death Ward before combat

Judgement Day. Every creature that suffers damage from Spirit Guardians becomes marked by the Light for 1 minute. If a Weeping Angel casts Sacred Flame, all targets that were marked are targeted no matter the distance. The Mark disappears after a Dispel Magic or Remove Curse has been cast, or the Weeping Angel has been killed. 

Legendary Resistances. 3/day

Multiattack. The Weeping Angel can make three Great Scythe Attacks; or one Great Scythe attack and cast Sacred Flame; or uses Reaping

Great Scythe. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 11 (2d6 + 4) magical slashing damage. 

Reaping. The Weeping Angel's Scythe is turned into pure radiant or necrotic energies as he swings it in a wide radius. Every creature within 30 feet of the Weeping Angel has to make a Dexterity Saving Throw. On a failure, the creature suffers 6d8 radiant or necrotic damage (your choice). If at least 1 creature is damaged by this attack, the Weeping Angel heals for half the damage dealt (not multiplied by targets that suffered damage)

The Weeping Angel has 3 Legendary Actions

Scythe Swing (Costs 1 Action). The Weeping Angel makes a Great Scythe Attack

Cantrip (Costs 1 Action). The Weeping Angel casts a Cantrip

Fly (Costs 2 Actions). The Weeping Angel fly's 30ft. without triggering attacks of opportunity

Reaping (3 Actions). The Weeping Angel uses its Reaping attack