The Big Dragon
All dragons are big, but if you ask the most ancient elves to speak on the big dragon, the eldest among them will know this can only be in reference to the largest of them all, the dreaded draconic titan. As large as the mountains themselves, the last war of the first age was against this beast alone, fought to decide the fate of the world itself. More than five miles long and taller than the greatest castles ever built in any age, it is said to have darkened the skies when it took flight, to have turned forests to deserts with its flame, and to have created canyons and lakes wherever it landed.
The mortal armies of the world perished by the millions as they fought, until that fateful day when it was finally slain for good. Not even the wisest and more learned of the elvish sages know what happened to its remains, but some suspect that its bones form the very structure and foundation for the subterranean kingdoms still around today. Many evil wizards have gone looking for traces of its once-mighty body, hoping to still find pieces of its power lying dormant in scraps of scales and bones. We can only pray to the gods that such a terror never sees the light of day ever again upon this world.
Draconic Titan
Titanic dragon (titan), chaotic evil
- Armor Class 30 (natural armor)
- Hit Points 820 (40d20 + 400)
- Speed 5000 ft., fly 5000 ft.
STR DEX CON INT WIS CHA 30 (+10) 8 (-1) 30 (+10) 12 (+1) 26 (+8) 16 (+3)
- Saving Throws Str +19, Con +19, Wis +17, Cha +12
- Damage Immunities fire; bludgeoning, piercing, and slashing from nonmagical attacks
- Senses blindsight 1 mile (5000 ft.), darkvision 5 miles (25000 ft.)., passive Perception 36
- Languages Common, Draconic, Primordial
- Challenge 30 (155,000 XP)
Empowered Attacks. The dragon's attacks are treated as magical and adamantine for the purpose of bypassing resistance and immunity to nonmagical weapons.
Fire Aura. At the start of each of the dragon's turns, each creature within 1 mile (5000 feet) of it takes 35 (10d6) fire damage, and flammable objects in the aura that aren’t being worn or carried ignite. A creature that touches the dragon or hits it with a melee attack while within 10 feet of it takes 35 (10d6) fire damage.
Frightful Aura. Each creature that starts its turn within 5 miles of the dragon and can see it must succeed on a DC 27 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 Aura for the next 24 hours.
Illumination. The dragon sheds bright light in a 5-mile (25000 feet) radius and dim light for an additional 5 miles.
Legendary Resistance (5/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Siege Monster. The dragon deals double damage to objects and structures.
Titanic Size. The dragon occupies a space of a 5-mile square. Creatures of Gargantuan size and smaller can occupy the same space as the dragon.
Actions
Claw. Melee Weapon Attack: +19 to hit, reach 1 mile., one 1000-foot square. Hit: 210 (20d20) bludgeoning damage
Fire Breath. The dragon breathes flame in a 2-mile (10000 feet) cone. Each creature in that area not behind total cover must make a DC 27 Dexterity saving throw, taking 105 (30d6) fire damage on a failed save, or half as much damage on a successful one. Creatures with resistance to fire damage do not reduce damage taken from this attack. Creatures with immunity to fire damage take half damage from this attack.
Tail. The dragon slams its tail in a 2 mile line that is 1000 feet wide. Each creature in that area must make a DC 27 Dexterity saving throw, taking 105 (10d20) bludgeoning damage on a failed save, or half as much damage on a successful one. Creatures within 300 feet of the center of the line make this save at disadvantage.
Legendary Actions
The dragon can take 5 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.
Attack. The dragon makes one claw attack or one tail attack.
Move. The dragon moves up to its speed.
Wing Attack (Costs 3 Actions). The dragon beats its wings. Each creature within 1 mile of the dragon not behind total cover must make on a DC 27 Strength saving throw. On a failed save, a target takes 55 (10d10) bludgeoning damage, is pushed back 30 feet, and is knocked prone. On a successful save, the target takes half as much damage and isn't pushed back or knocked prone.