De serpiente a dios dragón

Reborn as a charred, nail-sized snake with only three hours to live, Harlan Lynn binds the God-Tier Devouring System and talks icy prodigy Lina Jensen into a Soul Pact. She calls him useless until he evolves into the Violet-Gold Thunder Dragon. When an SSS Rank beast king descends, can he transform in time to save her and Drakonia?