How this SUMSMMG will work: the 4 crystal gems in the show can do something called fusion; where 2 gems dance and become 1 being with extra eyes and/or limbs. It's one of my favorite aspects of the show. Anyway, you will merge the gems yourself to get the fusions. Also there will be 2 special monsters... gems... idk what to call these things anymore... mergables? If you don't know what Steven Universe is, its a show on Disney and im not gonna explain the plot for you so either search it up or watch it.