Corpses (or, what's the use of dying)?

[13lackGu4rd]

some spells are dependent upon corpses, others aren't. animate/raise skeletons for example is independent of corpses on the battlefield while animate/raise dead is dependent on them. same goes for Rituals, some depend on them and some don't. there are also a few spells that don't actually need corpses but do get better with them, Undead Horde comes to mind, not sure if there are any other examples of the like.

[JonBrave]

Can I (reliably) tell from the descriptions --- on screen, vanilla --- whether a spell requires corpses?

[JonBrave]

For example, I just fired up my EA C'tis. Home province, no corpses. I can cast "Reanimation". The description says "corpses", later talks of "skeletons". Does it require corpses??