depends what it was made with (lesserx lesser or mojave x lesser and so on. Its a supper so it will through at least its base morp so pick what ever you would like to cross with the base morph ie: lesser x pastel etc. Cant go wrong with a pastel or spider
perhaps i took the question the wrong way if he meant a bel to pastel to make pastaves or pastels lessers or whatever. however, it he means what is good to combine to have an end result of a bel mixed with something, like a super mojave spider or something. i stand my post, that mixing a bel with anything is pointless.