based on D&D 5th Edition
Adult Blue Dragon
Huge  Dragon , Lawful Evil

Armor Class 19  (natural)
Hit Points 225  (18d12+108)
Speed 40 ft. , burrow 30 ft. , fly 80 ft. , swim 20 ft.



STR DEX CON INT WIS CHA
25  (+7) 10  (0) 23  (+6) 16  (+3) 15  (+2) 19  (+4)
Saving Throws Dex +5, Con +11, Wis +7, Cha +9
Damage Immunities Lightning
Senses blindsight,darkvision, passive Perception 22
Languages Common, Draconic
Challenge 16  (15000 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: +12 to hit, reach 10 ft., one target. Hit: 18 (2d10 +7) piercing damage.
Bite+. plus 5 (1d10) lightning damage.
Claw. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6+7) slashing damage.
Tail. Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 16 (2d8 +7) bludgeoning damage.
Lightning Breath. (Recharge 5-6) DC 19 dexterity saving throw, half damage on successful save, for 66 (12d10) lightning damage in 90 ft. Line
Frightful Presence. DC 17 Wisdom saving throw, frightened. Save at end of each turn, successful save creature becomes immune. in 120 Area