I know I promised to have a go at a column ages ago, and I've been thinking a little about this one. It's more a kernel of an idea than anything else, prehistoric action-horror weirdness. I'm no expert on the Mesolithic or Neolithic, though I might go and do some reading to help couch things correctly. Probably steal numerous ideas from this
thread.
I'm thinking a world where the spirit realm is close to reality, and sorcerors are those who bind the spirits with infernal pacts of servitude, rather than bargaining with them and placating them with offerings as is the proper way.