Adult Gray Dragon
Huge dragon, neutral evil
Armor Class
20 (natural armor)
Hit Points
218 (19d12 + 95)
Speed
40 ft., fly 80 ft., swim 40 ft.
STR
24 (+7)
DEX
15 (+2)
CON
21 (+5)
INT
15 (+2)
WIS
15 (+2)
CHA
17 (+3)
Damage Immunities
fire
Senses
blindsight 60 ft., darkvision 120 ft., passive Perception 24
Saving Throws
Dex +8, Con +11, Wis +8, Cha +9
Skills
Perception +14, Stealth +8
Languages
Abyssal, Aquan, Common, Draconic, Giant
Challenge
17 (18,000 XP)
Amphibious. The dragon can breathe air and water.
Legendary Resistance (3/day). If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack. The dragon uses its Frightful Presence and makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus 5 (1d10) fire damage.
Claw. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 14 (2d6 + 7) slashing damage.
Tail. Melee Weapon Attack: +13 to hit, reach 20 ft., one target. Hit: 16 (2d8 + 7) 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 17 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 of the effect ends for it, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.
Steam Breath (Recharge 5–6). The dragon exhales steam in a 60 cone. Creatures in the area must make a DC 19 Constitution saving throw. On a failed saving throw, the creature takes 63 (18d6) fire damage, or half as much damage on a successful saving throw. Being underwater doesn’t grant resistance to this damage.
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 15 feet of the dragon must succeed on a DC 24 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.