Corrupted burn

You hurl a mote of corrupted fire at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 fire damage. A flammable object hit by this spell ignites if it isn't being worn or carried.

The fire can be put out by water but the corruption needs to be scraped off the armor or item.

If the purple fire strikes skin the skin will burn and the surrounding skin will turn purple and the demonic blood will pierce into the targets blood stream. the target will take 1d10 of damage every round until the limb is removed or until death. If the burn reaches the torso the target will take 1d10 damage every round and have no way to get rid of it. The skin will start to rot, the target will have random muscle spasms, possible paralysis, seizures, strokes, and the demon blood will cause sickness, cancer, and bone rot until the character dies and becomes a demonic zombie, which will have violent and cannibalistic tendencies, similar to Rabies. The character also cannot rest until the corruption is dealt with.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).