Crimson fungi

Crimson fungi is a parasitic fungi found in Nexus. It mimics guts in smell and appearance to be ingested and then breaks down the host, producing a glowing, crimson tumor. Cassandra became infected by this fungus after eating many corrupted corpses and yoma which had eaten the fungi. She entered a state of crimson red, a state where the fungus breaks down the body unhindered but later stabilized into a case of crimson black, where the fungus lay dormant, unable to spread. Cassandra's survival can be attributed to Roxanne's gift of metal organs and the fact that the parasitic form of Roxanne was stronger than the fungus and stopped its spread. The fungi was later killed by Diva and removed by Clover and later Deborah.