Kindred of the East: Crimson Empires
Spirit, Boar (Tainted)
Twisted Western Spirits
Twisted spirits from Europe (or other Western locations). They are mad, tainted, and obviously related to the leaking power plant.
They are powerful and very rarely traveling alone. Some explode when killed or struck. Some engulf themselves in flames. All are very powerful and go where the unnatural taint is found.