i got stuck at the phase when prince become beast like something ,after defeating that flying dragon ,when an animated video flashed showing conversation between empress& other girl

Stuck how? Not sure where to go, or you got a glitch?

If you're talking about the cutscene where the Empress sends the woman in black off to fight, then you need to go to the Garden Hall. Make your way to the time warp room at the top, when you come back out you'll get caught by the Dahaka and thrown down a well. I've forgotten where exactly you go after that, but you get to another time warp room, and you end up back at the Sacrificial Chamber, where you see another cutscene.
If this doesn't help, you need to tell me a bit more about where you're stuck. :-)