The reason religion is so powerful

[Silver]

The term host likewise requires a symbiotic relationship between separate species. But let me guess, you just meant "like a host."

Kleptoparasitism may be intraspecific (the parasite is the same species as the victim) or interspecific (the parasite is a different species). In the latter case, the parasites are commonly close relatives of the organisms they parasitize ("Emery's Rule").
Kleptoparasitism