I really like the colors. Maybe you could wait a few days and see if you still want it like crazy. That's what I try to do and half the time I'm able to later talk myself out of spontaneous purchases, lol.
OK ok you don't really need it. You probably have something similar, don't you? I bought one of those 88 shades palette so I don't have to keep buying whenever something new comes out. They're cheap but works fine with UD shadow primer.