Blood Rain

You conjure a crimson cloud of death and necrosis over a 5-mile radius above you. This spell lasts 1d6 x 5 minutes after casting. Every ten minutes, the foliage under the Blood Rain starts withering and decaying, tiny to medium plants wither and decay within the first ten minutes, large and huge plants wither and decay after 20 minutes, and gargantuan plants/foliage wither and decay at the 30 minute mark. Additionally, all water within the radius becomes blood red, a creature taking a drink must succeed on a Constitution Saving Throw, or take 2d12 necrotic damage and become poisoned until the end of their next turn. Living creatures (All except Undead, Fiends, Celestials, Constructs, or things that do no have flesh), must make a Wisdom Saving Throw each minute of being under the rain, becoming frightened for 1 minute on a fail, and taking 2d10 Necrotic, and 2d12 Psychic damage too. If a small, or tiny beast is killed by the rain, its body begins to wither and decay until nothing remains. Medium and large creatures that die, have their body partially dissolved, with their bodies becoming eerie and volatile. Meanwhile, Huge and Gargantuan creatures that die, have their bodies partially dissolve too, however; From their bodies, after 1 hour, 1d6 parasitic organisms burst. After one week of the spell, all foliage, vegetation, and corpses eaten within that time, the eater must succeed on a Constitution Saving Throw or become poisoned for 1 hour and take 4d4 poison if the eaten thing is tiny or small, 4d6 poison damage if the thing is medium, 4d8 poison damage if the thing is large, 4d10 poison damage if the thing is huge, and 4d12 poison damage if the thing is Gargantuan. Additionally, during the week, if a creature steps onto the area that was subject to the Blood Rain, their speed is reduced by half, and they have disadvantage on Saving Throws, Attacks, and Checks requiring Dexterity. After the week is up, the area can start to heal, at a natural pace.