The Weakest Summon? From the Start, I Summoned an SS-Rank Holy Maiden of the Church

I’m Xu Feng, a mighty cultivator reborn, yet my family cast me out as a good-for-nothing. These days, summoners are a universally despised, useless profession. But I was the guide who led summoners through the Dark Age, which makes me their founding master, in a sense! Everyone says summoners are trash. Just as I was about to summon a goblin general and amaze the crowd, I unexpectedly summoned a seemingly delicate Holy Maiden of the Church. This... this can’t be right, can it? Could the Holy Maiden have answered my summons from inside a goblin lair?