Thanks to [Cherub] for the tip. Jiaoshou was deeply grateful.
Rex did not dare try it and risk being discovered.
A single remark from the Goblin had put Rex on the spot.
With that avenue ruled out, Rex could only pursue other options. He rocked the Crystal Bottle back and forth, toying with it as he asked, "I can't inspect its attributes, can I? Could you explain them to me?"
"What exactly is it? Why not take a good guess, Your Highness?" The Goblin smiled faintly. Rather than answering directly and explaining what the treasure was, he kept Rex in suspense.
"You want me to guess?" Rex smiled too. He was not annoyed; instead, he sounded rather interested.
"I can give you a hint, Your Highness. It's a consumable treasure," the Goblin offered.
"That hardly counts as a hint. I could tell at a glance that it's a consumable." Rex shook the Crystal Bottle in his hand.
He did not agree that the Goblin's remark qualified as a hint. Although Rex did not know what this potion-like treasure did, he could tell at a glance that it could only be used once. Like a Life Potion, once he drank it, that was it. It could not be used repeatedly, with the potion replenishing itself in the Crystal Bottle the next day after it was consumed.
"I've already given you the hint. Now it's up to you to guess, Your Highness," the Goblin said. Then he gave another sly smile and continued, "If you really can't figure it out, I can give you another hint, but you'll have to pay me ten more gold coins."
"No need. I don't have any gold coins to spare." Rex shook his head, declining the Goblin's offer.
The fellow truly had money on the brain.