Board Thread:Questions and Answers/@comment-64.233.173.223-20150425034435/@comment-25889587-20150502024559

If you're not using for lots of purposes, I don't find it worth the special evolution. However, if the blessed effect is significant enough or you are going to use it almost in every set such as Angel Cookie's Rainbow Feather, then I think it's pretty much worth it, since once you evolve, you cannot devolve the treasure.