Armor Class 22
Hit Points 481 (26d20 + 208)
Speed 40 ft., fly 80 ft., burrow 40 ft.
Saving Throws DEX +7, WIS +10
Skills Perception +17, Stealth +7
Damage Immunities lightning
Senses Blindsight 60 ft., Darkvision 120 ft., passive Perception 27
Languages Common, Draconic
Challenge 23
Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Shatter (level 3 version).
Rend. m +16, reach 15 ft. Hit: 18 (2d8 + 9) Slashing damage plus 11 (2d10) Lightning damage.
Lightning Breath (Recharge 5–6). dex DC 23, each creature in a 120-foot-long, 10-foot-wide Line. 88 (16d10) Lightning damage. Half damage.
Cloaked Flight. The dragon uses Spellcasting to cast Invisibility on itself, and it can fly up to half its Fly Speed. The dragon can't take this action again until the start of its next turn.
Sonic Boom. The dragon uses Spellcasting to cast Shatter (level 3 version). The dragon can't take this action again until the start of its next turn.
Tail Swipe. The dragon makes one Rend attack.
Monster Manual (2024), p. 50