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.