I had a rather interesting and random idea for an item that could be made available, and could work like other similar items like NCJB and RMP.
Something that, when used on a creatu, gives a random effect that isn't OAK, or CS. This can include a low possibility (1 to 2%?) of switching to a Mutant (thus creating a second method of creating a mutant), and, more commonly, give one of the various effects that you can get throughout the year through an event, like Undead, Derp, Frostlight, etc. It could have CS effects included if you made it CS too.