Port-A-Gene

[warcrimes]

Either a big bulky device that, as mentioned, gives the person you put into it just about every nasty thing imaginable (or that you load activators into -ACTIVATORS- which it then magically applies to anyone you put in it, whether they could normally have that stuff activated or not)...

Or what about a chameleon-bomb disguising device you load ONE INJECTOR into that then gives that mutation to anyone that comes within X tiles of it... unless they're wearing the special genetics jumpsuit you get along with it?  Would that be interesting?

Gene Grenades box. 
like the tactical nades, comes with an assortment of grenades that apply a shitty mutation to people caught in it.