Read ‘ten shadows in Percy Jackson’ Online for Free, written by the author amarril14, This book is a Anime & Comics Fanfic, covering Fanfiction, Fan Fiction, Fanfiction Net, and the synopsis is: MC hasnt the need to defeat every creature in the ten shadows to utilize it as he is a direct descendant of yamata no or...
MC hasnt the need to defeat every creature in the ten shadows to utilize it as he is a direct descendant of yamata no orochi and with his godly parents essence every ten shadows creature is already tamed. The only issue the mc will have is conserving his energy as summoning mahoraga is gonna damn near kill him until he gets the proper energy reserves so it's a last resort.