Yusuf Zuck was very curious about the stone disk in the deepest part of the cave, and the fog emanating from the stone disk could actually block his Eye of Insight. It should be noted that his Eye of Insight can see through everything and can also see the essence of things.
However, now that stone disk was preventing him from seeing the person sitting on it.
Of course, he also knew that the person must definitely be the Empress without a doubt.
"Whatever, I'll sneak in first, hide in there Invisible, and then strike suddenly when they're... you know!" Yusuf said and his body vanished instantly, then he quickly approached the floating dust.
To enter the floating dust required a secret word and a special gesture, but he had learned it by now, so he slipped in easily.
There was nothing special inside the inner cave, and following Pharaoh's memory, he quickly found the underground passage and dove in.
