Lighthouse. That sounds like the most interesting boss.
Ask about the history of the tower and the bosses, who the exposition man is, why we're statues, etc?
Rachel approaches the giant man while the other parties discuss which boss they should take.
"Where did this tower come from?" she asks quietly.
"It sprung from the depths only a few days ago. That is why I've awakened all the heroes. At least, as much as I could."
"Why were we statues?"
"A long, long time ago, back when Atlantis was one unified land, the Atlanteans were beings of great power. When the dungeons sprang up from the depths, the Atlantean champions fought them and sunk them. Atlantis has sunken itself in its hubris, I'm afraid. It was I who took the children of Atlantis and turned them to stone, to save them from the Flood and to awaken them to fight if the Dungeons were to rise again."
"So, who are you?"
"My name? I've forgotten. My purpose is clear, however, to awaken the heroes from their petrified slumber."
Sarah walks up to where the giant and Rachel are talking and puts an arm around Rachel's shoulders. "Are you a staff member? I mean, this is a game, so are you like, just really in-character?"
The giant smiles. "I am an AI NPC, I'm afraid."