To be honest, with that recent battle against those nine freaks, Tie Dan really suffered quite a loss. You could say that apart from the thrill of the kill, he gained absolutely nothing. Oh, well, not absolutely nothing; he's got this flute, at least.
Although it's only on temporary loan from the Liu Family and he'll have to return it eventually, and Tie Dan knows nothing about music anyway. He certainly doesn't have enough Primordial Spirit to wield it effectively to show even half of its power.
But no matter what, this is a First-grade treasure of the Divinity Transformation kind.
Just like with the Three Leopards earlier; if he had used a saber to slash or a bow to shoot, who knows how many more rounds it would have taken, and what a sorry state he'd be in before winning.