Reaper, by Dark, R. Reaper

Upon accepting a deal from the Grim Reaper, 17-year old Nick Cross thought he could change reality, defy destiny, resurrect something in his life that went missing, but he never expected what the Grim Reaper was really offering, a chance to become the Grim Reaper himself. Chosen as the new Grim Reaper, or, Raveonite, Nick Cross steps out into the Und-r-world, but he should watch his back, for there are some things, in our world, and the next, that are truly worse than death. Monstrous souls named suras, giant spiders, and shadow people, are only a few of the things our dear Raveonite has to worry about, because a conspiracy is unfolding in the background that may destroy the Undrworld from the very core. Things only get harder for our young hero as he learns that he must fight in a tournament to protect the Undrworld, 411 years before he's fully trained. However, all hope is not lost upon our dear specter, because he has some allies to help him along the way, but it soon becomes hard for Cross to tell friend, from foe. Along Cross' journey, he will meet many a Soul, Pasorus, Eternian, and Transversal, but perhaps he should be more concerned about what lingers within his own soul.