Minus Zero

Katam, the king of hell, decided to destroy the Earth but he is lazy to do it. He ordered Vritra to destroy the Earth but what Vritra did was quite interesting: he goes to the Earth, finds a human and tell him to destroy the Earth. Not that the guy can say no anyway? Anum will now have to destroy the Earth. Vritra gives him immortality and regeneration, but he can't kill because his blood was cold since birth. The Earth is old now and it's time to destroy it.

But again... how?