Fairy Tail: Invincible Wills and Feelings (NaLu Fan Fiction) {Watty Awards 2013}

After the incident with the Infinity Clock, things seem to be peaceful again in the guild of Fairy Tail. But that soon takes an abrupt turn when Lucy falls ill; resulting from the leader of a dark guild called Black Essence. His name is Mastel, and he plans to take Lucy's soul in order to increase his own power! Na...