Now i'm going to create a weaponized cancer, it will be made to spread....spread like soft butter over the corpses of my foes! Conventional cures will be all but useless against this... mega-cancer... And thus the only way to save the world will be MY CURE!!
THEN I SHALL TAKE OVER THE WORLD! HA HA HA HA!
(And mega-cancer? Is that really the best i can come up with right now?)