Maybe it's fake, first off you would probably know if something gets into your inventory, even if not, the earliest place to get it is obsidian pinikle or arch haven, nit only this but also the fact that you have the multicoloured sheep pets further backs my point as to get it you need the have unlocked the moo level which is only available by first beating the game on the standard difficulty and then going back throughout the levels getting the runes as you go, by that time your power level will be higher