Avatar of Soresto

Spellcasting. The [Avatar of Soresto] is a 12th-level spellcaster. Its spellcasting ability is [Wisdom] (spell save DC 17, +9 to hit with spell attacks). The [Avatar of Soresto] has following [Cleric] spells prepared:
Cantrips (at will): [Guidance], [Light], [Mending], [Sacred Flame], [Word of Radiance]
1st level (4 slots): [Bane], [Bless], [Charm Person], [Command], [Cure Wounds], [Disguise Self], [Guiding Bolt], [Inflict Wounds], [Shield of Faith]
2nd level (3 slots): [Hold Person], [Lesser Restoration], [Mirror Image], [Pass without Trace]
3rd level (3 slots): [Animate Dead], [Bestow Curse], [Blink], [Dispel Magic]
4th level (3 slots): [Dimension Door], [Polymorph]
5th level (2 slots): [Dominate Person], [Holy Weapon], [Insect Plague], [Modify Memory], [Raise Dead]
5th level (1 slot): [Create Undead], [Forbiddance], [Planar Ally]

[Necronomic Scimitar]. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 6 (1d6 + 2) [Slashing] damage, 10 (2d6 + 2) [Necrotic] damage.

Cloak of Shadows. As an action, you can use Channel Divinity to become invisible until the end of your next turn or until you attack or cast a spell.

Invoke Duplicity. As an action, you can use Channel Divinity to create an illusion of yourself that lasts for 1 minute, or until you lose your concentration (as if you were concentrating on a spell). The illusion appears within 30 ft. of you. As a bonus action, you can move the illusion up to 30 ft., but it must remain within 120 ft.of you. You can cast spells as the illusion, and when both you and your illusion are within 5 feet of a creature that can see the illusion, you have advantage on attack rolls against that creature.

Turn Undead. As an action, you present your holy symbol and speak a prayer censuring the undead. Each undead that can see or hear you within 30 feet of you must make a WIS saving throw (DC 17). If the creature fails its saving throw, it is turned for 1 minute or until it takes any damage. A turned creature must spend its turns trying to move as far away from you as it can, and it can’t willingly move to a space within 30 feet of you. It also can’t take reactions. For its action, it can use only the Dash action or try to escape from an effect that prevents it from moving. If there’s nowhere to move, the creature can use the Dodge action.

Destroy Undead. When an undead fails its saving throw against your Turn Undead feature, the creature is instantly destroyed if its challenge rating is at or below 2.

It can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The creature regains spent legendary actions at the start of its turn.

Attack (Costs 2 Actions). Attacks once with the [Necronomic Scimitar].

Regeneration. Regains 20 hit points instantly with the surrounding light pouring into the wounds, all light sources are halfed in intensity.

Minor Spell. Casts a spell level 3 or lower.

Major Spell (Costs 2 Actions). Casts a spell level 4 or higher.