I was wondering if EoG's modifiers stack such as 1 EoG is -1, 2 EoG's is -2 and so on if any one knows please give me a heads up cause i was thinking of some new magic heavy lists and if this is the case 2 EoG's plus a slann would really mess with some armies (skaven and vampires especially come to mind)
In the Engine's ruesl is specifically states that you may only reduce one lore by -1 per engine and Engines may not stack on the same lore. So although you can have -1 to cast on two lores, you cannot have -2 to cast on one lore.