The knight stood his ground in front of the door. His sword gleamed dully, and his armor was weighed down from the accumulation of freezing rain. He had heard the screaming go on for hours, but did not leave his post. To do so would be punishable by death; not that it mattered at this point, as survival was the least of his worries.
His expression under his visor remained unchanged as It lumbered into view. Consider his opponent: pale, pink skin. Spherical body, with strange flipper-like appendages for arms, and stubby feet. A cruel smile was on its face, and its eyes harbored an ancient madness. Its body bulged and moved strangely in places, and the knight could hear the desperate screaming from within as its victims were digested slowly.
The knight was not afraid. He had been chosen as the last line of defense, and not without cause. He was the greatest of the elite warriors of his order, and had dedicated his life not only to excellence in battle, but to conquering his own fear of death. He raised his sword with both hands in challenge, and the ice on his armor cracked and shattered on to the ground around him. He narrowed his eyes and prepared himself mentally. When the beast approached, he would run with lightening speed and plunge his ancient sword through it. He awaited its approach.
The creature stopped, its expression unchanged. Suddenly, its mouth gaped hideously, and spewed a torrent of bile, gore, and the half-digested parts of still living victims. The knights eyes widened in horror a moment before his armor and flesh were consumed.
The creature, still smiling, trudged toward the door. It stepped into the void, dropped on the platform, and sprang into the air. Upon landing, it did a cute dance.
Have you heard of cosmic string theory? Imagine a book, and each page is a universe. The page in the middle is our universe, and the further you get toward the end of the book, the more the universe in question differs from our own. Imagine, if you will, what nameless horrors lie there, searching for a way to find new victims. A way, or, as the case may be, a door.
What is the name of this beast which devours its way through worlds? Let me draw you a picture. First you draw a circle. Then you dot the eyes. Add a great big smile, and presto. It's kirby!