Thawne absorbs the powers of the Negative Forces of Nature which transforms him into their avatar. Barry absorbs the powers of the Positive Forces of Nature to be Thawne's equal, and the two speedsters engage in fight a that threatens to bring about Armageddon. Barry realizes that neither can win, tricking Thawne into unleashing the Negative Forces' full power, only to redirect the negative energy back into him which destroys Thawne for good.