Huge dragon, neutral evil

Armor Class: 17 (natural armor)

Hit Points: 172

Speed: 40 ft , fly: 80 ft , burrow: 20 ft

STR

23 +6

DEX

12 +1

CON

20 +5

INT

10 +0

WIS

13 +1

CHA

15 +2

Saving Throws: CON +10, WIS +6

Skills: Perception +11, Stealth +11

Damage Immunities: Cold

Senses: Darkvision 240ft., Passive Perception 21

Languages: Draconic

Challenge Rating: 13 ( 10000 XP)

Proficiency Bonus: +5

Actions

Multiattack. The dragon makes one Bite attack and two Claw attacks.   Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) piercing damage plus 3 (1d6) cold damage.   Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.   Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 13 (2d6 + 6) bludgeoning damage.   Cold Breath (Recharge 5–6). The dragon exhales a blast of frost in a 60-foot cone. Each creature in the cone must make a DC 18 Constitution saving throw. On a failed save, the creature takes 36 (8d8) cold damage, and its speed is reduced to 0 until the end of its next turn. On a successful save, the creature takes half as much damage, and its speed isn’t reduced.

Bonus Actions

Phase (3/Day). The dragon becomes partially incorporeal for as long as it maintains concentration on the effect (as if concentrating on a spell). While partially incorporeal, the dragon has resistance to bludgeoning, piercing, and slashing damage.

Legendary Actions

The dragon can take 2 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.   Tail Attack. The dragon makes one Tail attack.   Treacherous Ice. Magical ice covers the ground in a 20-foot radius centered on a point the dragon can see within 120 feet of itself. The ice, which is difficult terrain for all creatures except lunar dragons, lasts for 10 minutes or until the dragon uses this legendary action again.

Suggested Environments

Astral Plane