Flyby
The dragon doesn't provoke opportunity attacks when it flies out of an enemy's reach.
Ancient Solar Dragon
Gargantuan Dragon · Neutral
Armor Class18
Hit Points425 (23d20 + 184)
SpeedWalk 30 ft., Fly 120 ft.
Challenge21
STR28
DEX15
CON26
INT17
WIS18
CHA16
Traits
Legendary Resistance (3/Day)
If the dragon fails a saving throw, it can choose to succeed instead.
Nebulous Thoughts
Magical attempts to read the dragon's mind or glean its thoughts fail automatically.
Siege Monster
The dragon deals double damage to objects and structures.
Unusual Nature
The dragon doesn't require air.
Actions
Multiattack
The dragon makes one Bite attack and one Tail attack.
Bite
Melee Weapon Attack +16 to hit, reach 20 ft., one target. 19 () 🏹 Piercing damage plus 10 () ☀️ Radiant damage.
Tail
Melee Weapon Attack +16 to hit, reach 20 ft., one target. 13 () 🔨 Bludgeoning damage.
Photonic Breath Recharge 5
The dragon exhales a flashing mote of radiant energy that travels to a point the dragon can see within 240 feet of itself, then blossoms into a 40-foot-radius sphere centered on that point. Each creature in the sphere must make a DC 23 Constitution saving throw, taking 66 () ☀️ Radiant damage on a failed save, or half as much damage on a successful one.
Legendary Actions
Tail Attack
The dragon makes one Tail attack.
Blinding Brilliance (Costs 2 Actions)
The dragon emits magical light in a 30-foot-radius sphere centered on itself. Each creature in this area must succeed on a DC 23 Wisdom saving throw or be until the end of its next turn.