It would basically be a dungeon of three floors: the base, the 1F, and the battle stadium.
In the base, there are twelve doors, one for each hour (over each door there will be a number). The player must complete ALL of them, in no order, although at the beginning only 3 doors will be open. Once all are completed, a solar clock that is in the middle of the room, will activate and the player must stand in it for it to elevate to the next floor.
In the 1F, there are another twelve doors, but related with the months, and the Zodiac Signs. The player must complete all of them again, no matter the order, and again, just 3 doors will be open. Once all are completed, the solar clock will activate and elevate again to the next floor.
In the 2F, the player will walk through a hallway, and a kind of vortex will appear, and will time travel (not exactly, it will just appear a part similar to each of the temples, and will have to defeat again the temple boss), and after completing the 4 parts, Link, Link will reach to a pendulum, and will have to use the Mirror Shield to reflect the light coming from a hole in the roof. When the player does this, the platform in which Link is will begin moving, accelerating, and then will appear in a big white platform, that is the battle stadium.
Anyway, I still need some of zdudes work for this