You reach into the void and call down a vertical column of dangerous cosmic material that rains destruction upon creatures in the area and shrouds the terrain around it in a swirl of stardust. This matter is made up of bits of burning stars and chunks of frozen comets, and it deals 5d12 cold damage and 5d12 fire damage to every creature in the area when you Cast the Spell. For the spell's duration, the cosmic material reduces visibility and mobility, making the area
greater difficult terrain and making everything seen within or through the area
concealed.