The duo spent a total of three days in the secret realm before stepping out. When they came out, there wasn't any difference from when they entered the place.
The Elder from the Burchard Family guarding the portal expected to hear stories of Grey's exploits in the secret realm once again, but when he was greeted with people casually stepping out without any breathtaking stories, he was astounded. It was common knowledge that whenever Grey steps foot in the secret realm, he causes chaos in the camp of the Gnomes, sending them into retreat.
As a matter of fact, the geniuses who entered during the time Grey came the last time grew the most. They had the opportunity to explore the place and search for more treasures thanks to the fact that the Gnomes were nowhere to be seen.