I was wondering how you get or can make a blue star astera I have the d…

I was wondering how you get or can make a blue star astera I have the daisy gr and just need the blue star astera to finish up the final magic plant the Nox Orchid or if there is another way to make it any tips or hints would be welcome at this point as I am constently cross breeding and trying to find the right cross pollination that will give me the final plant