"Right, so on this planet-" she is going to provisionally treat that story as true, but keep an eye out for discrepancies "-there are a bunch of risk factors for undead arising. Besides desecrating the bodies, there is: powerful regrets on the part of the deceased, certain kinds of planar anomalies, necromancer activity, fey activity, the God of Undeath intervening, uh... there are more obscure factors probably, maybe ask the wizard about it. Burning the bodies prevents corporeal undead, but incorporeal undead like ghosts are more troublesome to deal with, so the normal tradition in most places is burial and some prayers for the dead."
"So, circumstances permitting, you generally want corpses put together in one piece in the ground. It isn't usually worth a Make Whole (that is a second circle spell for repairing things I can't remember if I mentioned it earlier) but if you have one to spare and the corpse needs reassembly..."
"Anyway, I bring this up because I wasn't sure if you were going to offer to help-" Anevia nods at the sleeping cultists "-but I figured I would mention all this before you uh, got loping and chopping." Anevia lets a little bit of grim humor into her voice.