Reincarnation of the Fourth Successor

Arsenic Penirala, the successor of the most powerful weapon, the Eclipse Kukri, is betrayed by his half-brother in his former life. As he is left to die in the snow, their God pities him and gives him another chance, taking him back to an 11-year-old boy to rework himself in history. Arsenic uses this chance to get revenge on his dear brother, not only that but also to return the royal throne to its former bloodline. His life won't be as easy as he thinks even if he has some tricks up his sleeves. Will Arsenic be able to get revenge on his brother? Will the royal throne be returned to its bloodline? Or will Arsenic die a more pitiful death in his new chance in life?