I thought a good deal of Sinister's own mutant enhancements were augmented through self experimentaion? And with what he has been able to tinker with and alter for the whole Summers bloodline, I was assuming he could come up with either something for himself with the prep time, or something to harm Leader with in that time. Perhaps three days isn't enough?
I'm not a sadistic mutant mastermind yet, so my theories on what he could come up with are probably not very decent
I guess the only thing would be if Leader could come up with some way of putting down Sinister in three days, if Sinister still has that whole molecular level control of his body thing (unless that has changed recently?) and tp/tk, right?
Gender: Male Location: Saving the House of El from itself.
I don't even know how Leader would even put down Essex.
The guy had insane ass regeneration and no sold elite level TP from Emma. With prep, Sinister just hijacks a Celestial again and wipes the floor with Leader.