No answer.
You knock again.
This time, the door creaks slowly open, to reaveal a swirling vortex, and you can see a blurry image of a mountain through it...
You are drawn to it, and suddenly, it absorbs you altogether.
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You stumble through to the other side. You're on the mountains. You can tell by the ground- it has a slight purple tint to it.
Look around