"Sara, come here for a second," William knew the moment he'd get his hands over this scroll, and he had to leave.
Opening a gate towards the place that man was at meant he'd also release tons of monsters into this world. He didn't want to do it here and planned to travel away first, taking a few days before daring to use the scroll.
He explained everything to Sara, asked her to do his task, and led the guild masters in this battle. They were doing just fine so far, but they still needed a leader to be present. He also stressed keeping in touch with high-end masters, coordinating with them, and not missing any grave news or big plans or something.
Sara wanted to ask about the reason for his sudden leave, but she got it without asking anything. She recalled the talk about that crystal and gate, the enemy he was about to go and face.