Once you defeat Jade Oni, you will talk to the emperor and he will tell you to go see Cyrus Drake. Once you talk to him you will go to the Myth Tower and defeat him (ALONE!!!!) He has 5,000 life and is pretty powerful, so I suggest shields. After that, he will tell you to meet him in Dragonspyre! Hope I helped ... Amber DawnWhisper lvl 44 life (add me!)
Fight Jade Oni, get the key to DS, talk to Cyrus Drake then fight him. He's pretty hard ESPECIALLY if your Myth. I suggest shields or good storm cards (treasure cards if possible).
