Downpour

You become cloaked in steam rising from your pours, rising into the air and forming into a storm cloud. It appears at a point within range that you can see above yourself. It takes the shape of a Cylinder that is 300 feet deep with a 60-foot radius.

When you cast the spell, the area is filled with a heavy, piercing rain. That area is considered difficult terrain. A creature who starts their turn without full cover above them in the rain is bludgeoned by heavy, sharp pressurized water. They must make a strength saving throw, taking 10d10 piercing damage on a failure, or half as much on a success. For each size above small a creature is, they take an additional 2 die of damage this way. A flying creature has disadvantage on this saving throw. If a creature has partial cover, they gain the cover bonus to their saving throw against this spell. In addition, if the creature is only partially within the spell's effect, at DM discretion, their size may be considered to be lesser for the purposes of it's damage.

Until the spell ends, you can take a Magic action to call down a focused lance of water from the storm at one target within it, as if you had used the Aquatic Javelin spell at the same level of this spell.

If you cast this spell in the same area once a day for 30 days, the storm become sentient, lasting until dispelled and moving as it sees fit. Your DM may give it an alignment and personality, otherwise, decide randomly.

Using a Higher-Level Spell Slot. The damage increase for a creature's size is 2d10 larger for each spell slot level above 8.