So I am new to this game..I have yet to actually play it yet but I got my self the stater battalion and a cold one carnosaur. I just completed painting my first unit of warriors. I was going to start working on my riders soon, but i dont really like how the cold ones that they come with. I i just saw that the dark elves have some cold one riders and they look awesome. My question is can i replace the cold ones for the dark elf one and not have any issue when playing a game.