Any board wipe spell should do the work...
If the parasite doesn't kill it's host - it can live off the host for longer and doesn't have to find a new host.
the host kill you with their halo, they use it like a frisbee.
People used to shoot these amazing birds just for their feathers, which were usually used to decorate women's hats. It is now highly illegal to kill a migratory bird, such as herons and egrets.
Herons are birds.
No, herons eat fish.
It is rare, but yes sometimes. A few parasites don't directly kill their host, but make them do "careless things" that make it more likely the host will get eaten by the parasite's next host.
A "good" parasite doesn't kill it's host. It needs the host and killing it will kill the parasite. So it will allow the host to grow.
Herons eat fish.
Crocodiles and alligators eat herons.
Babies that come from blue herons
Humans kill the adults, and many predators take the young, like foxes, raccoons, herons,and large fish.
The Answer is ...IT CAN and IT CAN'TIt can kill a host when they are greater in number butIt can't kill a host when they are only few in numbers.BUT...... Parasites like leeches would be advantageous if they/it won't kill the host.-kiara