He Who Shatters the Divine Order

After Wayne Yeager awakens a dark serpent that seems worthless, his fiancée and his sect turn their backs on him and cast him out. Tied to a blood pact, he climbs in strength by devouring what he can and evolving through every trial. The road is brutal, but along it he finds a sword immortal and an odd, unsightly bird, and together they face deadly realms and fierce battles. Wayne soon discovers the hypocrisy hidden within the immortal world, and that discovery sets him against the very heavens that rejected him.