C717 The Changing Tombstone

Xiao Nan began to grumble to himself, puzzled by what the enigmatic figure expected him to wait for. The button had been pressed, the tombstone had materialized from nowhere, yet the door remained stubbornly closed. What was left to wait for?

Despite his confusion, Xiao Nan had no alternative but to heed the mysterious person's instruction. It seemed waiting was the only option available