Divinely Blessed. Alyxian can't be surprised and can't be changed into another form against his will.
Legendary Resistance (2/Day). If Alyxian fails a saving throw, he can choose to succeed instead.
Spellcasting. Alyxian casts one of the following spells, requiring no material components and using Charisma as the spellcasting modifier (spell save DC 17):
1/day each: lesser restoration, remove curse, water breathing
Multiattack. Alyxian makes two Spear attacks.
Spear. Melee or Ranged Weapon Attack: +9 to hit, reach 5 ft. or range 20/60 ft., one target. Hit:7 (1d6 + 4) piercing damage, or 8 (1d8 + 4) piercing damage when used with two hands to make a melee attack, plus 9 (2d8) radiant damage.
Force Wave (1/Day). Alyxian strikes the ground, creating a burst of energy that ripples outward. Each creature he chooses within a 30-foot-radius sphere centered on himself must succeed on a DC 17 Constitution saving throw or take 35 (10d6) force damage and be knocked prone. A creature that succeeds on the saving throw takes half as much damage and isn't knocked prone.
Parry. Alyxian adds 3 to his AC against one attack roll that would hit him. To do so, Alyxian must see the attacker and be wielding a melee weapon.
Arch Heart's Strike. Alyxian makes one Spear attack, and all damage from this attack is radiant.
Change Bringer's Dance. Alyxian moves up to his speed. This movement doesn't provoke opportunity attacks.