Is there any explanation for the creation of The Halloween Hare and The Mutated Pumpkin?

Question

Tibia wiki note: "The Halloween Hare is harmless and cannot be killed. It only appears on October 31 in a single invasion during the halloween event. When close to players, it will cast a spell that changes its appearance for vampire , ghost, witch, skeleton, mummy or pumpkin head. This attack can change the appearance of everyone, including himself, NPCs and other monsters. plains south of Dwarf Bridge on October 31. In 2006 the Pumpkin Head was added as a transformation as well. In 2007, some of the monsters present in Pits of Inferno were added, but this change was later withdrawn. "

My interest is something related to the creation of The Halloween Hare and The Mutated Pumpkin, any book?

The Halloween Hare - Tibia Wiki

Answer 1

From the Featured Article on Tibia.com -  https://www.tibia.com/news/?subtopic=newsarchive&id=2140&fbegind=16&fbeginm=4&fbeginy=2004&fendd=16&fendm=5&fendy=2021&flist=01011111

Did you know?

The Mutated Pumpking is a creation of the forces of evil that felt challenged by the new human resolve. From the realm of darkness, a malevolent spirit was sent to take hold of the body and soul of the greatest hero in Tibia. Yet, the cunning lord of rabbits had learned about the plan and warned the humans to prepare a set-up. They built a giant puppet body, set it on a throne, adorned it with an impressive armor and put a pumpkin with a carved face on top of it. Just as they had hoped, the evil spirit fell for it and took possession of the mimic. He struggled at first, but his immense powers made the pumpkin head come to life. The slimy creature began to attack humans only to be smashed by their regained courage. The evil spirit was banished from the world but his thirst for revenge allowed him to regain its strength. After a year, he was strong enough to fight his way back into reality. Much to his anger, though, the only form he could take was that of a giant pumpkin. Again, his rage could not keep brave heroes from turning him into pumpkin soup. The spirit was expelled again, and has returned every year since then.

This is explained in following book - “The Rise of the Pumpkin” - https://tibia.fandom.com/wiki/The_Rise_of_the_Pumpkin_(Book)

The Rise of the Pumpkin

”After many wars and always new threats by the forces of darkness, humanity was afraid of many things. It was no cowardice but a gnawing fear that slowly eroded courage and faith. The servants of evil seemed to appear everywhere and in many horrible forms. Humans had grown accustomed to be afraid of the dark and the unknown. This weakened their resolve and with that also the forces of good. The gods came together to find a way to rise the spirit of humanity once again. They discussed and debated but could not come to an agreement because their views were too contrasting. And while they still deliberated, suddenly one of their least and minor creations stood amongst them. It was the lord of the rabbit race who had passed unnoticed by the mighty guardians. Without fear the little rabbit faced the gods who looked upon him in astonishment. Then the lord of the rabbits proposed his idea to the mighty and great gods. Since rabbits are tiny and their enemies are many, they are quite familiar with fear and how to handle it. So the lord of the rabbits came up with the idea to have the humans overcome their fear by learning to laugh in the face of evil. The gods were amazed by this simple but clever idea. So they chose the mightiest warrior of the rabbit race and bestowed magical powers upon him. The daring hare gained the protection of the gods and the power to disguise humans with hideous appearances of monsters. Each year, the hare would appear for some time and do his work. So the humans learnt to laugh and had fun while appearing as monsters, and the great fear that had darkened the souls of humans gradually vanished. 

This enraged the forces of evil and so they called forth the most malevolent spirit from the realm of darkness. It was his task to spread fear among mankind once again. The spirit was sent to take possession of the greatest living hero among the humans and to wreak havoc in the name of darkness. Unbeknownst to them, the lord of the rabbits had anticipated that the forces of evil would strike back. So he had sent some spies to the realm of darkness and learnt about their plan in time. He warned the humans about the approaching danger and once again had the right plan to save the day. He asked the humans to build a puppet clad in a shining armor and to put it on a throne in the midst of their festivities. As the puppet's head served a pumpkin with a carved face. The clever hare had figured that a spirit from the depths of the realm of darkness was not familiar with humans and would assume the figure on a throne in the centre of festivities as humanity's greatest hero. And indeed he was proven right when the spirit arrived and tried to possess what he assumed a human body. But the spirit had immense powers and so he finally managed to take possession of the pumpkin head on the cost of nearly all of his powers. With hardly any power left, the spirit made the pumpkin move and began to attack the celebrating humans. But the humans had long regained their courage and were not afraid to fight back. They drove off the evil pumpkin that escaped to some remote place where he was finally banished from the world. It took the spirit one year to regain enough of his strength to fight his way back into reality. He re-entered the world at the place of his defeat and to his shock and dismay he was no longer a spirit but bound to a pumpkin-like body. The beast roared in rage but could do little about it. Again he tried to wreak havoc in the world but again valiant heroes stopped his rampage and banished him for another year. Since this day on, the spirit returns every year hoping that one day humanity will be weakened enough for him to finally take revenge“