Drevet's Devastation

With a word of power you reach out and conjure a meteorite and slam it into the earth. It crashes down in a 20ft radius, all creatures within the area must make a dexterity saving throw taking 10d6 cold and 10d6 fire damage or half on a success. After the meteorite strikes the ground is covered in shards of ice. Creatures can move through it at half speed and take no damage. Creatures that move through at full speed through it take 2d6 cold damage for every 5ft of movement spent.

At Higher Levels: For every level above 7 increase the damage by 2d6 for each damage type.