Fatal Touch

What Lies beyond creation, separated from the light? into the shadows where the light does not reach, at the edge of the primal waters, into the deepest depth of the endless black, something that none can comprehend, beyond abstraction, beyond understanding, beyond definition, the opposer to life, the adversary of all that is light and life. yet it is present everywhere at the beginning, at the end....no It is the End, for not even Immortals are beyond its grasp, as they are only temporarily exempt from it. to apply to meaning is to create a lesser person of its being(if it can be described as one). Death, The Absolute end of all, for not even abstracts themselves are an exception.

So I read about the fatal touch ability and I was wondering if someone touches u, what way could they die on the spot, not poison because I would like to know if there something that would kill on the spot like say the person explodes but what would be the science behind that? How could u touching them or them touching u maje them exsplode?