Huge Dragon, Unaligned
Armor Class 18 (natural armor)
Hit Points 181 (18d12 + 64)
Speed 35 ft., Burrow 25 ft.
STR
18 (+4)
DEX
11 (+0)
CON
18 (+4)
INT
9 (-1)
WIS
13 (+1)
CHA
9 (-1)
Skills Perception +4
Damage Resistances Poison, Thunder
Damage Immunities Lightning
Senses Darkvision 65 ft, Passive Perception 13
Languages Understands Draconic & Auran but can't speak them
Challenge 12 (8,400 XP)
Proficiency Bonus +4
Traits

Electroacidic Biology. The drake has advantage on saving throws against being poisoned, charmed, and/or paralyzed.

Legendary Resistance (2/Day). If the drake fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The thunder drake makes three attacks: one with its bite, one with its tail, and one with its horns. It can replace two of those attacks with an electro-spit attack.

BiteMelee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 20 (3d10 + 4) piercing damage plus 9 (2d8) lightning damage.

TailMelee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 22 (4d8 + 4) bludgeoning damage plus 7 (2d6) thunder damage.

StingerMelee Weapon Attack: +8 to hit, reach 20 ft., one target. Hit: 13 (2d8 + 4) piercing damage plus 3 (1d6) lightning or thunder damage (drake's choice) and the target must make a DC 15 Constitution saving throw, taking 19 (3d12) lightning damage & be paralyzed for 1 minute on a fail, or half as much damage and not be paralyzed on a success.

HornsMelee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 17 (3d8 + 4) piercing or bludgeoning damage (drake's choice) and if the drake moved at least 20 ft toward the target before attacking, an extra 10 (3d6) piercing or bludgeoning damage and the target must succeed on a DC 14 Strength saving throw or be knocked prone.

StompMelee Weapon Attack: +7 to hit, reach 5 ft., one prone target. Hit: 13 (2d8 + 4) bludgeoning damage.

ClawMelee Weapon Attack: +7 to hit, reach 5 ft., one prone or paralyzed target. Hit: 11 (2d6 + 4) slashing damage.

Electro-Spit. RangedWeapon Attack: +5 to hit, range 95 ft., one target. Hit: 27 (5d10) lightning damage plus 13 (2d12) thunder damage.

Lightning Beam (Recharge 6). The drake exhales a blazing & crackling bright blue magical blast of pure electricity in a 110-foot line that is 15-feet wide. Each creature in that area must succeed on a DC 16 Dexterity saving throw, taking 60 (11d10) lightning damage and, if the creature is Large or smaller, knocked prone on a failed save, or half as much damage and not be knocked prone on a success.

Legendary Actions

The drake 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.

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

Tail Strike. The drake makes a tail or stinger attack.

Description

Thunder drakes are a special classification of draconic creatures. Believed to be descended from some of the first chromatic blue guard drakes, thunder drakes are quick adapters that have diverged into a few different species, all of which have something unique. 

Common thunder drakes are, as their name suggests, the most common and numerous species of thunder drake. Growing to be 38-55 ft long and 10-20 ft tall, these drakes can grow very large. Common thunder drakes are much more intelligent than other species of thunder drake, most likely even being the most intelligent thunder drake species known. Common thunder drakes rarely travel in groups, but when they do, it is usually a family group. These creatures also, like all other thunder drakes, have stomach acid that digests food up to 8-9 times faster than that of a normal dragon or dragonborn. Because of this, they have to eat a lot more than normal dragons do. 

Habitat: ArcticHillMountainUnderdark

Dragonekillax2

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