Bumi was the wild-eyed, eccentric, elderly King of Omashu. Prior to the start of the Hundred Year War, Bumi had been a close friend of Avatar Gang, and he remained the only known friend from Aang's childhood still alive by 100 AG .He became an old and wild man, prone to cackling and snorting laughter at jokes. Despite his apparent frailty, Bumi was an earthbending master, at one point claiming himself to be "the most powerful earthbender you'll ever see".
Where to Find:
Once you warp to /warp bosses you go straight, then turn left to the green island leading up to King Bumi, Click him.
Then to start the fight, click the Ready Sign.
FrostBreath to keep him stuck.
Air Spout to keep in the Air and hit Bumi & Flopsie from above.
Bloodbending to fling him.
AirShield to defend yourself.
Try to attack one of them at a time.
Once you start the fight, Bumi will launch at you with his earthbending dealing heavy damage, even when you're out of range.
He also has his pet Flopsie defending him, so think twice about hurting him.
Earth Kingdom Spear