Ancient Sapphire Dragon

Gargantuan dragon (gem), Typically Lawful Neutral
Armor Class 20 (natural armor)
Hit Points 370 (20d20 + 160)
Speed 40 ft., burrow 40 ft., climb 40 ft., fly 80 ft.
STR
27 (+8)
DEX
14 (+2)
CON
27 (+8)
INT
21 (+5)
WIS
19 (+4)
CHA
20 (+5)
Saving Throws Dex +9, Con +15, Wis +11, Cha +12
Skills History +12, Perception +18, Persuasion +19, Stealth +9
Damage Resistances lightning, thunder
Condition Immunities frightened
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 28
Languages Common, Draconic, telepathy 120 ft.
Challenge 22 (41000 XP)     Proficiency Bonus +7
Legendary Resistance (3/Day).
Spider Climb.
Tunneler.
ACTIONS
Multiattack.
Bite.
Claw.
Debilitating Breath (Recharge 5–6).
Spellcasting (Psionics).
BONUS ACTIONS
Change Shape.
Psychic Step.
LEGENDARY ACTIONS
Claw.
Psionics (Costs 2 Actions).
Telekinetic Fling (Costs 3 Actions).

This full creature's stat block is not available (not OGL).

Fizban´s Treasury of Dragons
Ancient Sapphire Dragon