Aseir Liadon

Immortality. Aseir is immortal, does only need to eat one meal per month, can't be aged by any means, can´t die of poison, old age and the power word kill.

Legendary Resistance (3/day). If Aseir fails a saving throw, it can choose to succeed instead.

Raw Spell Caster. Liadon uses the raw magic of all things to cast spells. The antimagic field spell does not affect him or any of his magic items.

Magic Resistance. Aseir has advantage on saving throws against spells and other magical effects, and it's immune to charms. Plus, magic can't put him to sleep, and no spell of 3rd level and lower can affect him unless he wants to.

Lucky. Aseir is under a spell that gives him, permanently, the effects of the 9th-level spell foresight. Is not possible to end this spell by any means.

Spellcasting. Aseir is an 24th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 34, +16 to hit with spell attacks). Aseir can cast disguise self, false life, darkness and invisibility at will and knows the following spells (he does not need to prepare them to cast them):

Cantrips (at will): fire bolt, light, mage hand, prestidigitation, shocking grasp, mending, message, mold earth

1st level (5 slots): detect magic, identify, chromatic orb, charm person, illusory script, cure wounds, purify food and drink, speak with animals

2nd level (4 slots): detect thoughts, mirror image, misty step, alter self, lesser restoration

3rd level (4 slots): counterspell, fly, lightning bolt, tongues, haste, speak with plants, remove curse, revivify

4th level (3 slots): banishment, fire shield, greater invisibility, hallucinatory terrain

5th level (3 slots): cone of cold, scrying, wall of force, modify memory, raise dead

6th level (2 slots): globe of invulnerability, chain lightning, mass suggestion

7th level (2 slots): teleport, plane shift, simulacrum

8th level (2 slots): mind blank, sunburst, antimagic field

9th level (1 slot): time stop, wish, meteor swarm

10th level (1 slot): Tolodine's Killing Wind, Proctiv's Move Mountain, Mavin's Create Volcano

11th level (1 slot): Mavin's Worldweave

*Aseir casts mind blank, fly, false life, greater invisibility, globe of invulnerability and stoneskin spells on itself before combat.

Multiaction. Aseir can make two weapon attacks, or a weapon attack and cast a spell and a cantrip, or cast two spells instead.

Longsword, +3. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 8 (1d4 + 3 + 3) piercing damage.

Aseir can use 3 legendary actions per day.

Potent Cantrip. Aseir casts a cantrip at max damage (if any at all) .

Potent Spell (Costs 2 Actions). Aseir casts a spell at max damage (if any at all).

Precise Attacks (Costs 2 Actions). Aseir makes two weapon attacks at max damage.

Grand Catastrophy (Costs 3 Actions). Aseir kills up 15000 Hp worth of creatures within 100 miles of distance. None of this creatures can have more than 1000 HP.