Corrosive Rain

A dark purple storm cloud appears in the shape of a cylinder that is 15 feet tall with a 20-foot radius, centered on a point you can see within range directly above you. The spell fails if you can’t see a point in the air where the storm cloud could appear (for example, if you are in a room that can’t accommodate the cloud).

When you cast the spell, choose a point you can see under the cloud. Purple, green and black rain pours down from the cloud to that point. Each creature within that point must make a Constitution saving throw. A creature takes 6d6 acid damage on a failed save, or half as much damage on a successful one. On each of your turns until the spell ends, you can use your action to move the acid cloud and cause another deluge in this way again, targeting the same point or a different one.

At Higher Levels. When you cast this spell using a spell slot of 4th or higher level, the damage increases by 2d6 for each slot level above 3rd.

This spell was created by Cameron the Clairvoyant, who aimed to expand the parameters of magic. While aboard an Alien ship in the year 2104, Cameron and Captain Ridley Scott faced down an Alien Hive Queen and defeated her in space. Before the Alien Queen's demise, Cameron was able to obtain a sample of her corrosive black blood and use it as a catalyst to create this spell.