A Letter to My Friend location (Maze of Mirrors)

Clue

"This is the 500-year-old stone tablet, freshly dug out from Icewing Heights. We'll start the bidding at five big ones!" As soon as the auctioneer finished talking, merchants started to their bids with hand signals. Where could the other half be? Go to the pile of stones near the cliff bridge to find clues.

Story

The other half of the relief stele was discovered in the Maze of Mirrors. Inside, it contained a letter sealed with the emblem of Luterra. "I've received your message that you're about to enter eternal sleep. I've forgotten how short Human life is. I'm not quite immortal myself, so I'm going to find a good place to hide. As you know, I'm quite capable for a Yoz. So long as I'm alive, what you're worried about won't come to pass. Rest in peace, my good friend."