Huge Celestial, lawful good
Armor Class 18 (natural armor)
Hit Points 189 (14d12+98)
Speed fly +90, walk +40, climb +30
Challenge 13
Saving Throws cha +1, con +1, wis +1
Skills perception +5
Damage Resistances poison; nonmagic B/P/S attacks
Damage Immunities fire, radiant
Condition Immunities charmed, exhaustion, frightened, poisoned, prone
Senses truesight 120', passive Perception 20
Languages all, telepathy 120'
Angelic Weapons. Its weapon attacks are magical. When it hits with any weapon deals extra 4d8 radiant (included below).
Immortal Nature. Doesn't require food drink or sleep
Magic Resistance. Advantage: spell/magic effect saves.
Multiattack. Two Bites or Sunrays. Can replace one with Constrict.
Bite. Melee Weapon Attack: +11 to hit, 10 ft., one target, 15 (2d8+6) piercing damage + 18 (4d8) radiant.
Constrict. Melee Weapon Attack: +11 to hit, 5 ft., one target, 17 (2d10+6) bludgeoning damage + 18 (4d8) radiant and target is grappled (escape DC 18). Until this grapple ends creature is restrained and kalkydra can't constrict another target.
Sunray. Ranged Spell Attack: +11 to hit, 120 ft., one target, 24 (4d8+6) radiant + 9 (2d8) fire.
Song of Sunrise (1/Day). Sings a song to welcome the dawn causing sunlight to fill area in a 120' radius around it. Lasts 1 min.
Spellcasting. Cha (DC 19) no material components: At will: detect evil and good light3/day ea: daylight dispel evil and good1/day ea: commune greater restoration
Solar Nimbus. When hit by an attack it surrounds itself in a fiery nimbus searing attacker: 9 (2d8) fire and 9 (2d8) radiant and nimbus sheds bright light in 30' radius and dim light an additional 30'. Until start of kalkydra's next turn a creature within 5 ft. of kalkydra that hits it with melee attack takes 9 (2d8) fire and 9 (2d8) radiant.
Source: Tome of Beasts 3 · OGL/Open