Corellon (PDG)

Arch Heart. Fey and elves are unable to harm Corellon. Corellon instantly recognizes and can control any non-Archfey fey creatures.

Limited Immortality. Corellon can only be slain by an artifact, wielded by a creature with a divine rank. If reduced to 0 hit points in any other manner, he disappears and immediately reappears in Arvandor. 

Unerring Accuracy. Corellon cannot gain disadvantage on his attack rolls with Amlath'Hana for any reason, and creatures gain no benefit from half cover or three-quarters cover from him.

Spell Tracker. If Corellon is concentrating on a spell affecting a creature, he knows their location and  can make attacks against them with Amlath'Hana regardless of their distance and ignoring cover as long as they are on the same plane.

Legendary Resistance (10/Day). If Corellon fails a saving throw, he can choose to succeed instead.

Spellcasting. Corellon is a grand-level spellcaster. His spellcasting ability is Charisma (spell save DC 27, +19 to hit with spell attacks). Corellon has all Cleric, Druid, Ranger, Enchantment, and Illusion spells prepared. He casts these spells at will.

Multiattack. Corellon makes 5 attacks with Amlath'Hana

Amlath'Hana (10/Day). RangedWeapon Attack: +42 to hit, range 10,000 ft., 1 target. Hit:32 (5d8 + 10) piercing damage. The target must then make a DC 27 Constitution saving throw or be stunned until the start of Corellon's next turn.

Volley (30/Day). Corellon makes 100 attacks with Amlath'Hana

Weave Snare (30/Day). Corellon makes an attack with Amlath'Hana, if it hits the target must make a DC 27 Charisma saving throw at the start of their turn, on a failed saving throw they are unable to cast spells that, they remake the saving throw at the start of each turn and on a sucess they are able to cast spells. This effect expires after 24 hours.

Spell Shot (30/Day). Corellon casts a spell that targets a single creature with a casting time of 1 action or bonus action, and makes an attack Amlath'Hana against a creature. If the attack hits, the bow deals no damage, and the spell takes effect on the creature without a saving, dealing maximum damage or healing the maximum amount of hit points.

Ruler of Avandor and the Feywild. Corellon teleports himself and any willing creature to or from Arvandor or the Feywild.

Corellon can take 10 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. Corellon regains spent legendary actions at the start of his turn.

Snipe. Corellon uses his Multiattack action

Volley. Corellon uses his Volley action

Weave Snare. Corellon uses his Weave Snare action

Spell Shot.  Corellon uses his Spell Shot action

Divine Presence. All Fiends and Undead under CR 20  60 ft. must make a DC 27 Wisdom saving throw on a failed save, they are killed instantly.