Frost Wyrm

Frost Shard Breath (Recharge 6). Dexterity Saving Throw: DC 21, each creature in a 60-foot cone. Failure: 21 (6d6) piercing damage and 45 (10d8) cold damage. Success: Half damage. Failure or Success: The area becomes difficult terrain for 1 minute for creatures other than the drogulum, and when a creature moves into or within the area, it takes 2d4 piercing damage for every 5 feet it travels.

Ice Mist Breath. The area in a 30-foot emanation originating from the wyrm, spreading around corners, becomes heavily obscured for 1 minute or until a strong wind (such as one created by gust of wind) disperses it. When a creature starts its turn inside the area, it takes 10 (3d6) cold damage.

BONUS ACTIONS

Swallow. Strength Saving Throw: DC 23, one Large or smaller creature grappled by the wyrm (it can have up to three creatures swallowed at a time). Failure: The target is swallowed by the wyrm, and the grapple ends. A swallowed creature is blinded and restrained, has total cover against attacks and other effects outside the wyrm, and gains one level of exhaustion due to the extreme cold at the start of each of the wyrm’s turns.

If the wyrm takes 40 damage or more on a single turn from a creature inside it, the wyrm must succeed on a DC 25 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, each of which falls in a space within 5 feet of the wyrm and is prone. If the wyrm dies, any swallowed creature is no longer restrained and can escape from the corpse using 20 feet of movement, exiting prone.