i pick 4 because, yes.
It was to be one of his smaller scale pieces of work. Just a building that was about to be taken down - collapsed on its own weight. He took out a few of the load-bearing structures on the inside. There were criminals that he had judged which could no longer evade the law. It would look like an accident. There would be additional casualties a large number by human standards.
And he wouldn't have interfered with any bystanders.
If not for that familiar face there. The building was staring to crumble when Thylas saw Roger. He appeared next to him, placed a hand on his back, and offered his hand.
"Take my hand... let's get out of here. A lot of people are going to die, Roger."