Archer30, right. You change the state of C simple linear congruent generator. Era uses its own generators, thus your code does nothing ) Era has API to get/restore generator state, but state size (array of bytes) is not guaranteed to be 4. And it will not work in multiplayer battle, for instance.

H3 developers didn't bothered about it and used rseed before every battle or hero level up. Where do you need fixed seed and could you use SplixMix32 generator instead for this purpose?