Traitor Geneticist items - Mutator Pen / Radiation Grenades

[mozi]

Because this way the victim would have no indication of what caused the mutation.

Except for the dude standing right next to him just like when people sleepypen drugs with text that shows.

The mutations from the pen take a few seconds to activate (so you have time to get away and not be ratted out!), but when they do, they go off all at once.