This too shall pass

Shard was very, very old. If he had once been a creature of flesh, there was no sign of it now. His wings were great spans of granite, coated in obsidian scales. His bones were mithril, with great copper nerves snaking their way through his massive frame. 
He moved through the stones of the Plane of Earth as easily as a fish through water, leaving no trace of his passing. From the tip of his nose to the end of his tail a hair's breadth under a mile away, he was acutely aware of every vibration and every disturbance that he passed. For a creature as large as he, he had to be sure to move swiftly and carefully, so that he did not leave a trail of destruction in his wake.
While his movement was smooth and efficient, he needed to constantly travel in search of food. Bauxite, chalk an marble made up most of his diet, and it was usually no trouble to steer clear of the inhabited areas of the plane and search for fresh deposits where he would not be disturbed.
These however were not usual times. The Plane of Earth was now riddled with bubble of other planes pushing their way in. Some were small, barely 100 feet across, but others stretched on for miles and took many days to safely circumvent. He could feel them appear, as his home plane was dragged elsewhere and replaced with foreign material. He worried what would happen if he were dragged to the Plane of Water, a poor dragon swimming in a bubble of earth in an unknowingly vast ocean. More worrying still - what if on part of him was caught. Would his leg be torn clean off as it occupied a different place to the rest of him, or would he be bodily dragged through to certain death?
Now he was circling around a patch of Earth that had been replaced with a plane he did not recognize. He could feel heat coming off it, and could sense the presence of obsidian, sulfur and silicon, as well as water. As he passed, he felt a mind reach out to his. He could sense the confusion in the other mind, as it sought to understand his brain of crystal and salt. "Greetings, oh great Shard. You are mighty, you are powerful. I sense your hunger; I can feed you for a thousand days, if I could only ask an hour of your time."
Shard did not know what a demon was. He knew there were thousands, perhaps millions of different kinds of creatures in the multiverse. Some sought to do him harm, others to aid him. Some feared him, and some welcomed his passage. All of this passed beneath Shard's notice, as no creature had the power to hurt him, nor help him. Anything that claimed otherwise was either a liar or a god, and Shard had no time for either. 
The voice was relentless "Shard, you know your world as you know it is coming to an end. Soon all shall be fire and suffering. I see your fear, there is no need to die hungry and afraid. With my help, you can thrive. All I ask is for you to do a few simple tasks for me. Do we have a deal?"
Shard talked so very rarely, perhaps once a decade. It took him a few minutes to remember how to string together thoughts into the heavy syllables of his native tongue. He spoke out loud, letting his ears hear his words and reverberate through his mind for the demon to hear as well.
"No thank you. What you offer is something I cannot accept. I do not deal with other creatures, I simply wish to live my life by the rules and laws of this plane. That is all I want. I sense evil and cruelty in you, and wish to be rid of you. Do not contact me again."
Shard expanded his senses in hundreds of miles in every direction, reading even the smallest vibration. He sensed movement all around. Wherever the Plane of Earth bordered one of the strange bubbles of a foreign plane, he sensed battle and activity. It had been many years since the Plane of Earth had seen such combat.
The demon's voice returned, insistent "Listen. Just because you're big doesn't mean you're above this. We swarm over you like ants and tear you to shreds one scale at a time. We will find the places you have never felt pain and we will prod and probe until you wish for death. Until now I have been gracious with you, but disobey me again and you will know the depths of suffering."
Shard gathered his thoughts and focused on the demon's mind, and the vibrations of its tiny body a half mile away. Then he concentrated, bringing a brain the size of a small town to bear on the demon's mind. He felt a brief flash of pain from the demon, before the mind disappeared and the vibrations ceased. He searched out the other minds near it, those full of rage and malice, and concentrated on them to, as one by one they screamed and were still.
Satisfied, he continued on his way, towards a chalk deposit he could sense a mere days travel away. By the time he was far enough away from where the demon was that he could no longer sense the invading plane, he'd already forgotten about it entirely.