Worldfire / Worldwinter

Force an entire region toward unnatural heat or cold. You may trigger a lethal heatwave, deep freeze, impossible thaw, protective warm season, or sudden frost age. Combat damage is indirect and story-scale, affecting travel, shelter, supplies, water, harvests, fortifications, and armies.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.