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Homebrew

Gwathróg CR: 4

Medium elemental, unaligned
Armor Class: 13
Hit Points: 10d8+40
Speed: 30 ft

STR

10 +0

DEX

16 +3

CON

18 +4

INT

6 -2

WIS

11 +0

CHA

10 +0

Saving Throws: Dex +5, Con +6
Skills: Cold Aura. The Gwathróg emits a chilling aura within a 10-foot radius. Any creature ending its turn in this area must succeed on a DC 15 Constitution saving throw or take 2d6 cold damage.
Senses: blindsight 60 ft. (blind beyond this radius), passive Perception 10
Challenge Rating: 4
Proficiency Bonus: +2

Actions

Chill Touch. Melee Spell Attack: +6 to hit, reach 5 ft., one creature. Hit: 13 (3d6 + 3) cold damage, and the target can't regain hit points until the start of the Gwathróg's next turn. If the target is a creature, it must succeed on a DC 15 Constitution saving throw or have disadvantage on attack rolls until the end of its next turn due to the numbing cold. Frosty Exhale (Recharge 5-6). The Gwathróg exhales a blast of freezing wind in a 15-foot cone. Each creature in that area must make a DC 15 Constitution saving throw, taking 3d8 cold damage on a failed save, or half as much damage on a successful one. Creatures that fail their saves have their speed halved until the end of the Gwathróg's next turn.

Reactions

Icy Retort:. When a creature the Gwathróg can see hits it with an attack, the Gwathróg can cause its Cold Aura to flare up. The attacker must succeed on a DC 15 Constitution saving throw or take 2d6 cold damage.

Gwathróg means Shadow's Breath in Dark Elvish   This creature is sensed rather than seen, known for the chilling breeze that precedes its approach. The Gwathróg emits a low, mournful howl that resonates through the darkness. It's said to feed on the warmth of living beings, leaving a trail of frost in its wake.   Highly territorial, the Gwathróg avoids any strong vibrations or loud noises but is drawn to the warmth of campfires and living breath. Encounters with it are rare but terrifying, marked by sudden drops in temperature and a profound sense of unease.

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