Looks great! A few little things to fix though, Nova's Hero ability is a little confused, it says to increase the effectiveness of a non-nova force event you play but it doesn't say by how much. Also, I think you should rename the actual Nova Force Card, there's a lot of Nova being thrown around in this deck and it can get a little confusing, making sure that things don't have the same name will simplify it. Other than that, looks good, love the nemesis