This disgusting spell is used in binding a malignant parasite inside a new
host. The parasite is quite unnoticeable when it is in sleeping state and
still attempting to infiltrate into a living organism. When the infiltration
has been completed, the parasite is no longer in sleeping state and turns into
malignant parasite attempting to feed its master by deteriorating the host.
Malignant parasites eventually die when the host body generates resistance
against the malignant growth, but advantage on the expense of others may be
gained, even if the parasite would only prove to be a small nuisance.