Only one, but a lion!
Leo did this magificent poster of Jack just to while away a rainy Wednesday. It's not strictly canonical as there are no bat-winged lions in mythology as far as I know, but you may have noticed that the lamassu at the British Museum keeps cropping up - he's going to play a bigger part in season two - and you're going to see Jack riding a winged beast in issue #13 (yes, we do plan that far ahead!) and later.