The explosion itself wasn't that huge. It was more like two or three grenades going off.
What killed the people inside was Sam's [Biology Manipulation] instead.
Everyone was laying on the floor. There was no blood anyway, nor any signs of struggle. Everyone looked like they were peacefully put to sleep….
Eternal sleep.
Sam looked at the white-haired boy in front of him and spoke warmly, "You'll be a great catch."
-Slash!
Cutting off his fingers, Sam created five clones.
As soon as they were created, he spoke coldly, in contrast to before, "Two of you will stay here. One of you revives this white-haired boy and any other useful ones you can find. The rest of you, come with me."
"Yes!" The clones replied in unison.
*
-Slam!
-Slam!
-SLAM!
Slamming open every door one by one in such a large building was a drag. But Sam had no way of searching through the tower.