If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack
The dragon makes three Rend attacks. It can replace one attack with a use of (A) Spellcasting to cast (level 2 version) or (B) Weakening Breath.
Rend
Melee Attack+14, reach 10 ft. 17 () 🗡️ Slashing damage plus 4 () 🔥 Fire damage.
Fire Breath Recharge 5
DEX SaveDC 21, each creature in a 60-foot Cone [Area Of Effect]. Failure: 66 () 🔥 Fire damage. Success: Half damage.
Weakening Breath
STR SaveDC 21, each creature that isn't currently affected by this breath in a 60-foot Cone [Area Of Effect]. Failure: The target has Disadvantage on Strength-based D20 Test and subtracts 3 () from its damage rolls. It repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.
Legendary Actions
Banish
CHA SaveDC 21, one creature the dragon can see within 120 feet. Failure: 10 () 🌀 Force damage, and the target has the condition and is transported to a harmless demiplane until the start of the dragon's next turn, at which point it reappears in an unoccupied space of the dragon's choice within 120 feet of the dragon. Success or Failure: The dragon can't take this action again until the start of its next turn.
Guiding Light
The dragon uses Spellcasting to cast (level 2 version).
Pounce
The dragon moves up to half its Speed, and it makes one Rend attack.