Ever heard about Old Latin in fantasy?

Latin is frequently used for incantations in fantasy. In my opinion, it's too familiar, and the mock Latin incantations only make it sound more embarrassing. Did you ever see Old Latin, though? It resembles Ancient Greek a little more (-os instead of -us, more diphthongs), the endings are also less reduced.

cumé tonás, Leucésie, praé tét tremónti (cum tonas, Luceti, prae te tremunt)