Howling iceberg

The Howling Iceberg is a massive chunk of glacial ice, sapphire blue where the light refracts and gleaming white where it reflects. The iceberg is riddled with convoluted tunnels through which perpetual winds howl.   The iceberg formed around the body of a dead zhite dragon. The iceberg never melts, and its perpetual winds blow from the planes, carrying the biting cold.  

Description

Biting Winds. The area within 500 feet of the Howling Iceberg is always extreme cold, and strong winds blow throughout that area in the direction of the iceberg’s movement. When undirected, the iceberg drifts up to 4 miles per hour (40 feet per round) with the tide and winds.   Longhouse (A). An ancient, weathered longhouse sits on a flat plain of ice and snow. Trophy hides and horns of monsters decorate the walls and roof of this structure.   Tunnels. Openings in the ice lead to twisting tunnels, some naturally formed by wind and water, others tooled and cut, and still others melted by great heat. A creature who finishes a long rest in the tunnels must succeed on a DC 14 Wisdom saving throw or gain 1 level of exhaustion from the howling winds wearing down the creature’s mind.   The tunnels in the Howling Iceberg twist deeper than should be possible. A creature exploring the tunnels can make a DC 20 Wisdom (Perception or Survival) check after each hour. A creature that succeeds on three checks in a row or that rolls a 20 on the d20 finds the white dragon dead body.  

Features

Extreme Cold. A creature in the icy region must succeed on a DC 10 Constitution saving throw at the end of each hour or gain one level of exhaustion. Creatures with resistance or immunity to cold damage automatically succeed on the saving throw, as do creatures wearing cold weather gear (thick coats, gloves, and the like) and creatures naturally adapted to cold climates.   Frigid Water. The water is most often covered in a thin layer of ice, thin ice has a weight tolerance of 3d10 × 10 pounds per 10-foot-square area. Whenever the total weight on an area of thin ice exceeds its tolerance, the ice in that area breaks. All creatures on broken ice fall through.
A creature can be immersed in frigid water for a number of minutes equal to its Constitution score before suffering any ill effects. Each additional minute spent in frigid water requires the creature to succeed on a DC 10 Constitution saving throw or gain one level of exhaustion. Creatures with resistance or immunity to cold damage automatically succeed on the saving throw, as do creatures that are naturally adapted to living in ice-cold water.
Slippery ice is difficult terrain. When a creature moves onto slippery ice for the first time on a turn, it must succeed on a DC 10 Dexterity (Acrobatics) check or fall prone.


Cover image: Farewell by Greg Rutkowski

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