These little things have extremely high adhesion and can attach to the exposed blood vessels of people or NPCs without anyone noticing, and then suck out every drop of blood from them at a speed visible to the naked eye.

The body under the skin became shriveled, and the butterfly wings perched on it changed from black purple to conspicuous red. The flexible tentacles spit out traces of liquid, looking down at the last vitality of the parasite ...

A trace of compassion ...