Surprise
The token started glowing, which didn't surprise Sam much.
But the next thing did. There is a projection that came out of it. It is comprised of many runes that are formed of bright red light.
Sam looked through these patterns and instantly understood what they were signifying. It is an energy circulation pattern through which he could access the stone for its real purpose.
He did exactly as the runes instructed and Sam felt like his mind entered some kind of new space. He found himself floating in a vast empty red space. He couldn't see anything else other than deep red.
As he was thinking about what the hell is happening and why he was there, he felt another presence.
He turned around to find a person who he is familiar with.
"You? What are you doing here? This is the surprise, those three told me about?"
Sam indeed felt surprised, because that is the last person he expected to see there. It is the Demon soul swordsman. Jack's teacher.