Thalia Pool Height

	Before him was a drained reflecting pool, long and rectangular. Jason couldn’t tell how deep it was, because the bottom was filled with mist.
...
	Lupa made a rumbling noise deep in her throat, and the mist in the pool dissolved.
	At first Jason wasn’t sure what he was seeing. At opposite ends of the pool, two dark spires had erupted from the cement floor like the drill bits of some massive tunneling machines boring through the surface. Jason couldn’t tell if the spires were made of rock or petrified vines, but they were formed of thick tendrils that came together in a point at the top. Each spire was about five feet tall, but they weren’t identical.