Cthulhu, God of Minds

Cthulhu's Strength. Whenever a creature not allied with Cthulhu is within 100 ft. of Cthulhu, Cthulhu, God of Minds' Armor Class includes its Strength modifier.

Spellcasting. Cthulhu, God of Minds is a 20th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 20, +17 to hit with spell attacks). Cthulhu, God of Minds has the  following spells prepared:
Cantrips (at will): All
1st level (10 slots): All                                                                                                                          2nd level (10 slots): All                                                                                                                        3rd level (10 slots): All                                                                                                                          4th level (10 slots): All                                                                                                                          5th level (5 slots): All                                                                                                                            6th level (3 slots): All                                                                                                                            7th level (1 slot): All                                                                                                                            8th level (1 slot): Feeblemind, Earthquake                                          9th level (1 slot): Meteor Swarm                                                                                                   

Ichor. If Cthulhu, God of Minds is reduced to 0 or less hit points, Cthulhu regenerates- regaining 500 hit points. Cthulhu, God of Minds can now use its mythic actions.       

Shatter Mind (Recharge 6). Cthulhu takes its action to destroy the mind of a creature it can see. The creature must make a DC 18 Wisdom saving throw or take 10d12 psychic damage and be knocked unconscious. If this damage reduces the creature to less than half of their negative hit point maximum, they are killed and return undead as a servant of Cthulhu who is charmed by Cthulhu. 

Once each round, during another creature's turn, Cthulhu, God of Minds can take a legendary action. If a legendary action costs an action, skip Cthulhu, God of Minds that many times in the initiative. 

Confuse (Costs 1 Action). All creatures within 100 ft. of Cthulhu must succeed on a DC 20 Wisdom saving throw or be frightened or restrained by Cthulhu for 1 round. 

Summon Servant (2-day). Cthulhu summons a creature with a challenge rating of 4 or less to do its bidding. The creature is subjected to the charmed and must follow Cthulhu's bidding for 1 minute, when it disappears. 

Resistance (1-day). Until Cthulhu, God of Minds' next turn, it has resistance to all damage and automatically succeeds all saving throws. 

Mythic Actions can be used on a bonus action on Cthulhu's turn or as a reaction taken on another creatures' turn (no trigger has to be stated.) If a mythic action costs an action, skip Cthulhu, God of Minds that many times in the initiative. 

Destroy (Costs 2 Actions). Cthulhu attempts to destroy one creature it can see. The creature must succeed on a DC 18 Wisdom saving throw or be killed instantly. 

Polymorph (1-day). Cthulhu turns into any creature of its choice. Cthulhu's size, ability scores (except for Intelligence and Wisdom), and current hit points and hit point maximum change accordingly. Unless the form is capable of spellcasting, Cthulhu cannot cast spells. Cthulhu only uses this action if it is under 100 hit points. 

Wreck (Recharge 6). Cthulhu destroys one thing it can see within range (e.g. a wall, a window).