based on D&D 5th Edition
Ancient Blue Dragon
Gargantuan  Dragon , Lawful Evil

Armor Class 22  (natural)
Hit Points 481  (26d20+208)
Speed 40 ft. , burrow 40 ft. , fly 80 ft. , swim 20 ft.



STR DEX CON INT WIS CHA
29  (+9) 10  (0) 27  (+8) 18  (+4) 17  (+3) 21  (+5)
Saving Throws Dex +7, Con +15, Wis +10, Cha +12
Damage Immunities Lightning
Senses blindsight,darkvision, passive Perception 27
Languages Common, Draconic
Challenge 23  (32500 XP)
Legendary Resistance. (3/day) automatic succeed on save after failure.
Actions
Multiattack. Uses Frightful Presence, then makes one bite and two claw attacks.
Bite. Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 +9) piercing damage.
Bite+. plus 11 (2d10) lightning damage.
Claw. Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6+9) slashing damage.
Tail. Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 +9) bludgeoning damage.
Lightning Breath. (Recharge 5-6) DC 23 Dexterity saving throw, half damage on successful save, for 88 (16d10) lightning damage in 120 ft. Line
Frightful Presence. DC 20 Wisdom saving throw, frightened. Save at end of each turn, successful save creature becomes immune. in 120 Area
Wing Attack. DC 24 dexterity saving throw or take damage and knocked prone., for 16 (2d6+9) bludgeoning damage in ft. Melee