You're a Summoner! Why Are You Summoning the Great Sage Equal to Heaven?

[Everyone's Class Change + Invincible + Eastern Deities] In a world where everyone changes classes, Guan Zu becomes a Summoner. Facing a profession everyone agrees only wealthy families can afford to play, Guan Zu isn't worried in the slightest. I may be broke, but I've got a System! Bound to the [Strongest Summoning] System from the start, all his summoned spirits automatically ascend to Mythic rank! [Spirit Monkey] ascends to [Mythic! Great Sage Equal to Heaven]! [Lotus Fairy] ascends to [Mythic! Third Prince Nezha]! [Three-Eyed Monster] ascends to [Mythic! Erlang Shen Yang Jian]! You've assembled the Heavenly Court's Rebellious Crew bond! Your summoned spirits gain a 50% talent bonus! “You say Summoners are weak up close, but you'd have to get close to me first!” Guan Zu gazes into the abyss as the Abyssal Demon Lord glares back at him. When the sky behind Guan Zu fills with Eastern deities, the denizens of the abyss quietly raise a white flag.