GED'S Superior Realm of the Ravens

[S-GED]

You notice a sign on the door as you approach it. It states "Abandon all all rolls, yeast who enters here." Obviously the inhabitant has a sense of humor and a love for cooking. You try the handle but find it to be nothing more than ball of uncooked hamburger mixed with bits of broken glass. You manage to pull your hand back before getting cut. Good thing to, that meat looked quite fetted. As you turn to move on the door swings open to darkness. You step inside and feel a pain in your gut as the darkness twists.

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You find yourself in a cave with a smooth wall behind you. The ceiling stretches upwards for a mile, glowing moss the only illumination from above. The greenish light casts eery shadows around the cave. The cave is bare for all but a stage with a lone black stratocaster guitar. What is this realm and it's where is it's inhabitant?