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Adult Mummy Dragon

Huge dragon, chaotic evil

Armor Class 19 (natural armor)

Hit Points 256 (19d12+152)

Speed 40 ft., climb 40 ft., fly 80 ft.

STRDEXCONINTWISCHA
27 (+8)10 (+0)26 (+8)16 (+3)13 (+1)21 (+5)

Saving Throws Dex +6, Con +14, Wis +7, Cha +11

Skills Perception +13, Stealth +6

Damage Immunities necrotic

Damage Vulnerabilities fire

Senses blindsight 60 ft., darkvision 120 ft., passive Perception 23

Languages Common, Draconic

Challenge 17 (18,000 XP)

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions​

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Rotting Bite. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 19 (2d10+8) piercing damage plus 7 (2d6) necrotic damage. If the target is a creature, it must succeed on a DC 20 Constitution saving throw or be cursed with mummy rot. The cursed target can't regain hit points, and its hit point maximum decreases by 7 (2d6) for every 24 hours that elapse. If the curse reduces the target's hit point maximum to 0, the target dies, and its body turns to dust. The curse lasts until removed by the remove curse spell or other magic.

Claw. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 15 (2d6+8) slashing damage.

Tail. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 17 (2d8+8) bludgeoning damage.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 19 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.

Desert Breath (Recharge 5-6). The mummy dragon expels a breath of swirling sand in a 60-foot cone. Each creature within the designated area must succeed on a DC 21 Dexterity saving throw or suffer 63 (18d6) bludgeoning damage on a failed save. Additionally, a failed save results in being forcefully pushed back 30 feet. On a successful save, creatures take half the damage and are not pushed back.

Legendary Actions​

The dragon can take 3 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.

Detect. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 22 Dexterity saving throw or take 15 (2d6+8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Image by DALL·E

Art by DALL·E