This seems pretty cool. Have wizards level 10+ get called to Merles office. He gives you a quest that you have to grab a peice of a key, a spiral key, of course. The first key peice in Colossus Boulevard , The second in The tomb of storms. The third, Grizzlehiem, Fourth, in Jade Oni's Palace. Fifth, With Malistare. After, you return to Merle Ambrose. He would soon tell you to get 3 spells - To activate the key. One in Zafaria, one in Wysteria, and one in Avalon. Once so, you need to go to the teachers. Once they all give you a spell word, You go back to merle, he tells you to speak the words. The key comes together, but it doesnt work. He will then send you to a HUGE castle. His castle. You have to go to a courtyard in his castle. Gamma will meet you there. He will summon A Hydra, A different hydra with the heads of Death Myth, and Life. And one with 3 Balance heads. The will fix the key for you. Go to Bartleby and he will let you use the key. When you go into it, Its a dark version of the worlds, and the spiral doesnt exist, its one world, like it used to be.
Of course, you need to be level 15+ to be able to use the spiral door. It would give all the wizards something to hope for, BESIDES Kroktopia.