Game On.

Frozen

The library was freezing. Everything was made of ice, the bookshelves, the books, the walls and the ceiling. The floor was carpeted in soft snow that crunched underfoot. Icicles dripped from the ceiling and small dots of snow swirled around them in the air.
Cat pulled her jacket tighter across herself. "Let's just find the riddle before we freeze." She said, voice hoarse. It was so cold she could see her breath condensing in front of her face.
The others nodded in agreement, shivering through their thin clothes.
Luke was the first to find it. With shaking hands he unfurled the paper.
Glass, crystal or ice,
Can the vain entice.
Tame the secret,
For our own.
To see what
you've always known.

"Wait, is that saying the answer to the riddle is something we already know? Cause then this should be easy." Luke said, smiling through trembling teeth.
"Or really hard, because I don't know about you, Luke but I know quite a lot." Moira countered. "Seems to me that it's probably going to be really unobvious, but once we loose we'll hate ourselves because it'll turn out to be something we should have guessed. More like torture than easy, wouldn't you say?"
Cat croaked through chattering teeth. "Can we just go? If we're going to freeze anywhere, can it be on the way to save Pete?"

The door was large and ornate, sculpted out of ice. It was tall and foreboding, looking like some kind of entrance to Lord of the ring's mines of Moria than anything else.
Slowly, the group pushed it open. It creaked as it swung wide, ice and snow chipping off and tumbling everywhere.
Carefully, they all crept over the frozen threshold, tumbling out of the library into...
Into a field of grass and flowers.
Cat literally then decided not to try making sense of it all anymore.