Corruption

 Definition: 

Corruption magic is concerned with corrupting the natural state of the world and causing it to decay or rot. Most of its uses are sinister, such as withering life, causing disease or eroding structures. However, it can also be used to limit the harm it can also inflict.

 Example of Use: 

Corruption magic could be used to remove an infection from an open wound.

A low tier spell using corruption magic would be causing a piece of rotting wood to rot faster.

A medium tier spell using corruption magic would be causing metal to begin to rust.

A high tier spell using corruption magic would be creating a disease that could then spread.

 Cans: 

Can cause diseases, eroding, rotting, or withering. It can also be used to limit/correct these effects.

Can be combined with other magics to make these effects more effective.

 Cannots: 

Cannot use corruption to create an incurable plague.

Cannot be used to corrupt anything non-physical