This is episode 40 of 60 of Treasure Hunter's Golden Eye. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The middle of the season, where the conflict escalates.
After exposing a fake at an antique stall, the hero is beaten and mocked by a strange old man, who gifts him a luminous pearl before vanishing. Opening the box, he gains the Golden Eyes, allowing him to discern treasures and dominate the antique world.