Ancient Blue Dragon

Size: Gargantuan Type: Dragon Alignment: lawful evil Armor Class: 22 Hit Points: 481 Hit Dice: 26d20+208 Speed: "burrow": 40, "fly": 80, "walk": 40 Challenge Rating: 23 Actions: ["desc": "The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.", "name": "Multiattack", "attack_bonus": 16, "damage_bonus": 9, "damage_dice": "2d10+2d10", "desc": "Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage plus 11 (2d10) lightning damage.", "name": "Bite", "attack_bonus": 16, "damage_bonus": 9, "damage_dice": "2d6", "desc": "Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.", "name": "Claw", "attack_bonus": 16, "damage_bonus": 9, "damage_dice": "2d8", "desc": "Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.", "name": "Tail", "desc": "Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.", "name": "Frightful Presence", "attack_bonus": 0, "damage_dice": "16d10", "desc": "The dragon exhales lightning in a 120-foot line that is 10 feet wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16d10) lightning damage on a failed save, or half as much damage on a successful one.", "name": "Lightning Breath (Recharge 5-6)"] Special Abilities: ["desc": "If the dragon fails a saving throw, it can choose to succeed instead.", "name": "Legendary Resistance (3/Day)"]