Adult Boreal Dragon

Huge Dragon, chaotic neutral

Armor Class 19 (natural armor)

Hit Points 212 (17d12+102)

Speed fly +80, swim +30, walk +40

Challenge 17

STR
25
+7
DEX
10
+0
CON
23
+6
INT
15
+2
WIS
17
+3
CHA
16
+3

Saving Throws cha +9, con +12, dex +6, wis +9

Skills stealth +6, athletics +13, perception +15

Damage Resistances cold

Damage Immunities fire

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

Languages Draconic, Giant

Special Abilities

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.

Bite. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 19 (2d10 + 8) piercing damage.

Claw. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 15 (2d6 + 8) slashing damage.

Tail. Melee Weapon Attack: +13 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 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 or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Cinder Breath (Recharge 5-6). The dragon exhales a 60-foot cone of superheated air filled with white-hot embers. Each creature in that area must make a DC 20 Dexterity saving throw, taking 44 (8d10) fire damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action 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 20 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.

Source: Tome of Beasts 2 · OGL/Open