Summary: What would it be tomorrow? It didn't know.
An: My entry to the Triathlon! Enjoy y'all
Evolution
It shuddered in the depths of its hiding place. Voices, quiet little voices, reached it and it wanted to scream about the unfairness of it all. There was no point to hiding, it knew that despite its will it would be torn away from the darkness that gave it peace and thrust into the sunlight where the voices would scream at it until it was granted pity and placed back into its home. It was the same thing over and over again, the monsters would drag it out and then they would proceed to torture it.
For any normal creature it would look into their heads to see what would make the thing leave it in peace... then it would change to chase the creature away. The technique worked on everything but the monsters. Even if it tried to scare the monsters away, even if it gave everything it had, they would still mock it, force it into some warped evolution of that they thought it should look like… what it should be like. They would make it change and change and change again until it was half mad before throwing it away like trash.
Laughter.
Horrible mocking laughter would follow it and it would curl into itself in an attempt to find peace after its magical core was drained almost to the point of depletion. Many of its kind had died that way, afraid and alone without a drop of the magic that should have kept them safe. That should have kept it safe like it had for eons.
For every invader into its territory there was always a defense, always a fear, and at first the monster had been no different. They fled, leaving it and its kind in peace.
The monsters changed the game though. They found magic to torture it, to torture its entire species, and drive them out of their homes and into the world without a speck of shadow or mold to their names. It wasn't fair. They had been on the earth far longer than the monsters had been, and they had never even harmed anything… just scared it away. It just wanted to be left alone, it just wanted peace to live and breed and die with dignity. But it was not to be. The monsters came for it again and again and each time it grew dangerously weak- almost to the point of death. It would never live long enough to see any of its family again.
Rage, deep and sudden and unfamiliar took over the creature and it thrashed against the walls of its home. It would grow old or die trying! It screamed and wailed and thrashed uncontrollably until the door opened. He was face to face with a young monster, and rapidly it saw what scared the little monster most. It changed into a snake and hissed. The monster stared at him wide eyed and pointed a stick at him.
"Riddikulus."
Its body changed against its command and became something else- laughter.
The next monster approached. It transformed into a rabbit with fangs and bat wings.
"Riddikulus."
Again, it was forced into another shape- more laughter.
A female monster came up. It transformed into a monster itself and shouted at it in its monster tongue.
"Riddikulus."
"Riddikulus."
"Riddikulus."
It wobbled to and fro, shuddering slowly through the changes as it became harder and harder to scare the predators around it away. Was this it? Was this its final moment?
It was not to be, an old monster threw it back into its home and locked its door behind it. It wept as it heard the voices walk away… as it slowly slipped into unconsciousness it wondered what it would be forced to change into tomorrow and that if the monsters came back would it even last the day.
It didn't know, and it couldn't think of a worse hell.