Solar Nova Dragon

Gargantuan dragon, lawful neutral

Armor Class 12

12 Hit Points 492(26d20 + 208)

492(26d20 + 208) Speed 50 ft., fly 100 ft.

STR DEX CON INT WIS CHA 23 (+6) 14 (+2) 27 (+8) 19 (+4) 16 (+3) 22 (+6)

Saving Throws Str 13, Con +9, Int +11, Wis +10

Str 13, Con +9, Int +11, Wis +10 Skills Arcana +11, History +11, Insight +10, Perception +10, Persuasion +13, Stealth +9

Arcana +11, History +11, Insight +10, Perception +10, Persuasion +13, Stealth +9 Damage Resistance fire, lightning

fire, lightning Damage Immunity radiant

radiant Senses blindsight 60 ft., darkvision 120 ft., passive Perception 27

blindsight 60 ft., darkvision 120 ft., passive Perception 27 Languages Celestial, Common, Draconic, Ignan, Infernal

Celestial, Common, Draconic, Ignan, Infernal Challenge 24 (62,000 XP)

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Wildspace Dweller. The dragon can survive in a vacuum and doesn't require air to live.

Phase Step. The dragon can spend its move action to magically teleport up to its movement speed to an unoccupied point it can see.

Solar Flare (3/Day). As a minor action, the dragon's body can emit a blinding flash of light. Each creature within 20 feet of the dragon that can see it must succeed on a DC 20 Constitution saving throw or become blinded for 1 minuet. A blinded creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. Creatures with the Sunlight Sensitivity trait make this saving throw with disadvantage. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dragon’s Solar Flare for the next 24 hours.

Corona Aura. At the start of each of the dragon’s turns, each creature within 10 feet of it takes 10 (3d6) fire damage, and flammable objects in the aura that aren't being worn or carried ignite. A creature that touches the dragon or hits it with a melee attack while within 5 feet of it takes 10 (3d6) fire damage.

Innate Spellcasting. The dragon can cast each of the following spells 1/day each (7th level) without the need for material components. The dragon's spell save DC is 20.

aganazzar's acorcher

conjure elemental (fire elementals only)

crown of stars

plane shift

spirit guardians

sunburst

Actions

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks.

Bite. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 6) piercing damage plus 7 (2d6) radiant damage.

Claw. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 13 (2d8 + 6) bludgeoning damage.

Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 18 Wisdom saving throw or become frightened for 1 minute. A frightened creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.

Radiant Breath (Recharge 5-6). The dragon exhales searing light in a 120-foot line that is 10 feet wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16d10) radiant damage on a failed save, or half as much damage on a successful one.

Reactions

Bloodied. As an immediate reaction to when the dragon has lost half its health, the dragon recharges its Radiant Breath and immediately uses its Solar Flare.

Legendary Actions (3/Round)

Bite. The dragon makes a bite attack.

Claw. The dragon makes a claw attack.

Spell (Costs 2 Actions). The dragon casts one of its spells.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 21 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.