Terran (Arctic)

Crossing it

Navigate

DC 15

Forage

DC 15

Notice

DC 12

Routes are seasonal. A chart drawn in summer is wrong in winter because the ice edge has moved.

Exposure

• Extreme Cold

  Temperatures below about zero degrees Fahrenheit, or any water near freezing, made worse by wind.

  CON save, DC 10, rising by 1 for each hour after the first. End of each hour. One level of exhaustion.

  • Cold-weather gear

    Proper layers, a sealed suit or a heated shelter removes the save. Wet layers give disadvantage on it instead.

  • Immersion

    A creature in near-freezing water makes the save each minute instead of each hour, and is Incapacitated at three levels of exhaustion.

  • Gear

    Unheated power cells lose half their charge, and any check made with bare hands after an hour of exposure has disadvantage.

  • Adapted

    A creature native to a cold world, or with resistance to cold damage, ignores the save.

• Extreme Weather

  Wind, whiteout or downpour heavy enough to take away visibility and then footing.

  CON save, DC 13. End of each hour in the open. One level of exhaustion.

  • Obscured

    The whole encounter is heavily obscured. Ranged attacks beyond 30 feet automatically miss and Perception by sight fails past that range.

  • Wind

    A Medium or smaller creature in the open makes a DC 13 Strength save at the start of its turn or is moved 1d4 x 5 feet downwind.

  • No travel

    A day spent traveling in it covers a quarter of the usual distance and still costs the hourly save.

  • Shelter

    A built shelter, a vehicle or a sealed suit removes the save. A Wisdom (Survival) check at DC 12 finds or improvises one where the terrain allows.

  • Grounded

    Nothing flies. A vessel caught airborne takes 4d6 bludgeoning damage per hour and its pilot makes a DC 15 check each hour to hold a heading.

In play

• Ice margin

  The ice edge advances and retreats hundreds of miles across the year. A settlement is either on the water or a hundred miles from it, depending on the month.

• Under the sheet

  Liquid water sits under the ice across most of the world. It is reached through a bore, and native creatures know where the bores are.

• Long dark

  For part of the year the sun does not rise. Wisdom (Perception) checks that rely on sight have disadvantage in the open, and a light source is visible for miles across flat ice.

Regions on it

• Alpine The zone above the snow line: rock, ice and thin air, on ground that has to be climbed.
• Arctic Permanent ice over land, flat to the horizon, with the ice flowing slowly underneath.
• Aurora The rings where a world's magnetic field funnels the star's wind into the upper air.
• Coastline The strip between high and low tide, which is different ground every six hours.
• Frozen Sea Ocean covered by a layer of sea ice that supports weight until it breaks, over water that stays liquid.
• Lake Standing fresh water that separates into layers, with a cold bottom that preserves what sinks into it.
• Lower Atmosphere The layer of a world's atmosphere where weather occurs: breathable, turbulent and home to flying creatures and vessels.
• Near Space The last of the atmosphere, thin enough to count as vacuum for every purpose except drag.
• Settlement Built ground, lived in or abandoned: close quarters, hard cover, and a jurisdiction attached to every encounter.
• Subterranean Everything under the surface, with no light, no weather, and a route set by what the rock allows.
• Taiga Conifer forest to the horizon over bog, with a winter that runs most of the year.
• Tundra Treeless ground over permafrost, open, cold, and without shelter from the weather.
• Upper Atmosphere The stratosphere and mesosphere, above the weather and below space, with no breathable air and little lift.

Found here (5)

• Gelidus
• Ice Giant
• Ice Wyrm
• Ice Wyrm Spawn
• Wyvern