Geyser

Choose an element between fire, cold, acid and
poison. You designate a point within range. A
geyser explodes at that point and each creature
in a 30 ft radius area makes a Dex save, taking
10d6 damage of the chosen type on a failure, or
half as much on a success. The terrain in the
spell's area becomes difficult terrain foras the
earth shatters.
At Higher Levels. Each extra spell slot increases
the damage by 2d6.