C691 The Method of Opening the Castle

After spending a lot of time, the two of them finally returned to the front of the main entrance of the Black Castle. Standing below the main entrance, they raised their heads to look upwards.

Taking a deep breath, he retracted his gaze and turned to look at Qiu Zishu, "Old Autumn, what method did you try to use last time?"

Qiu Zishu's face flushed red and he muttered: "Last time I was here