Ancient Topaz Dragon

Gargantuan dragon (gem), Typically Chaotic Neutral
Armor Class 20 (natural armor)
Hit Points 280 (17d20 + 102)
Speed 40 ft., fly 80 ft., swim 40 ft.
STR
23 (+6)
DEX
12 (+1)
CON
23 (+6)
INT
20 (+5)
WIS
19 (+4)
CHA
20 (+5)
Saving Throws Dex +7, Con +12, Wis +10, Cha +11
Skills Intimidation +17, Perception +16, Stealth +7
Damage Resistances cold, necrotic
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 26
Languages Common, Draconic, telepathy 120 ft.
Challenge 20 (25000 XP)     Proficiency Bonus +6
Amphibious.
Fabricate (1/Day).
Legendary Resistance (3/Day).
ACTIONS
Multiattack.
Bite.
Claw.
Desiccating Breath (Recharge 5–6).
Spellcasting (Psionics).
BONUS ACTIONS
Change Shape.
Psychic Step.
LEGENDARY ACTIONS
Claw.
Psionics (Costs 2 Actions).
Essential Reduction (Costs 3 Actions).

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

Fizban´s Treasury of Dragons
Ancient Topaz Dragon