This is the end of Act 6 curtain 3, and one of my favorite boss fights in the game. There's very little challenge to the fight other than dodging flying objects he throws at the player Using bombs to blow up his tail, using the hook to pull the tail, and using boost cuts to fly up the dragon to slam down.
While this does sound like a lot, the battle is VERY standardized as you can see in the youtube link below.
All credit for the video goes to Soo Mungry