Parasites

Parasites are organisms who survive by exploiting a separate host organism whom they harm in the process. Parasites typically seek to siphon nutrients from their hosts, use their hosts as a form of shelter from the elements, deceive their hosts into raising their parasitic young, or some combination thereof.
Amanita - Amanita is a breed of mushroom known for its brilliant red and white spotted cap. The Amanita has incredibly robust spores that can bore themselves into just about any soft tissue and begin to take root and grow, which will have severe negative consequences to any Ib or animal foolish enough to consume them. If consumed, the spores will become lodged in the gastrointestinal tract and begin to grow and parasitically feed off of its host's food supply. Their growth interferes with digestion and will lead to abdominal pain as well as potentially intestinal rupturing if their growth goes untreated for too long.