Achilles born anew

Achilles, You lived a life of an unstoppable warrior With the agility of a tiger, and the power of an bear But with one weakness you fell, one shot in a heel made you wish to be born anew To be dipped one last time in the river Styx But a weakness moved to a darker place, for which you may protect A delusional choice, which will lead you to experience pain, not known to you Now, I shall grant your wish, but with one addition You shall be named to reflect your weakness once again Oh, Testachillies