While all magic can be dangerous and impermanent, it's not for nothing that some forms or types of magic are shunned by even the most superb mages and wizards. For hundreds of years, "shadow magic" has been a taboo in the entire Runeterra lands, as everyone fears that the horrors that once ravaged the world will be awakened again.

The worst of those horrors has a name, and its name is Morteng.

At the end of the Rune Wars, a secret society of magical warriors will do whatever it takes to defeat their opponents.

Although their names are not recorded in the extant records, they were the first to abandon their flesh and blood and enter the realm of the soul, known only as they hunted each other, not only on the battlefield, but also in the realm of their own subconscious thoughts and emotions.

Unfettered by the laws of physical reality, they fight in a way that is incomprehensible to most mortal minds, and they are even able to shape illusory Assassins to carry out orders.

Shadow mages seem to be very good at this kind of thing, so for a while, they dominated the realm of souls, sending it into the twilight.

The minds of mortals everywhere were tainted by this darkness. It drains their fighting spirit, intrudes on their dreams, allows nameless fears to bite them day and night, and even causes some to commit horrific and horrific crimes against their fellow citizens.

No one can tell whether it was these sufferings that created the Moteng out of nothing, or whether some low-level Assassin construct was corrupted by it and turned into something more egoistic and deadly.

Either way, the newborn shadow creature has taken on an immaterial form and an elusive horror. Morten does not understand any kindness, honor, or nobility It is the embodiment of fear, and does not need those self-restraint and control.

The demonic creature howled in the realm of the soul and pounced on the deviant stupid mages, those who had given it life, and it lashed desperately, hoping to end its own suffering.

It endured all the pain that made it cruel, but it soon took on the taste of mortal fear. In its field, time is almost meaningless.

But Morten will prolong each chase as long as possible, savor the pain of his prey, and then cut off their last ray of life in an instant. Soon, no one dared to enter the realm of Moteng anymore.

If the demon hadn't acted on the other side of the Veil, it's hard to say if the rune wars would have had another outcome, but later, the few remaining legends of shadow magic were hidden, and the use of this magic was equated with death sentences in many places.

The soul realm became a cage, and only a handful of intruders maintained it, and Morten became hungry. There was only one thing that tasted close to the feast of fear it had tasted, and that was when mortal thoughts drifted through nothingness in their sleep.

The flow of magic divides the boundaries between the two realms, where peaceful dreams can easily turn into nightmares, and with this flow of magic, Moteng finds a way to enter the mortal world after waking up.

Today, Moteng exists as a ghost, his eyes burning with cold light, and he has become the most primitive and vicious reflection of many people in the Runeterra.

From bustling cities to desolate plains, from the greatest kings to the lowliest peasants, any soul with flaws will attract this demon, which will then be twisted into mortal fear, and eternal darkness.

In the distant past, the seas of Runeterrae gave birth to civilizations long before the land. In the depths of what is now known as the Sea of Watchers, there used to be a magnificent city where the yodeler Fiz settled.

He lived with the craftsmen and warriors of this proud and noble race. Although Fitz was not of the same kind as them, they treated him without any prejudice.

Add to that his quirky temperament and amazing adventures in the vast expanse of the sea, and any party with him will be filled with joy.

But the world has changed, and the oceans have become warmer, attracting ferocious predators in the deepest trenches. Settlements everywhere have lost contact, but the city's rulers are still arguing over how to deal with the danger. Fitz volunteered to find the survivors, or whoever knew the details.

Then one day, the dragon shark came. These massive monsters stun their prey with a shrill whistling, and the streets of the majestic city soon become filled with red clouds.

In just a few hours, thousands of people died. The dragon shark hunted excitedly and went on a rampage in a frenzy, destroying the towers and temples of the city. Fitz smells the blood in the water and rushes back, wanting to join the fight and protect the city.

Too late. There is nothing left in the city to protect. When the chaos subsided, no one survived, and nothing was not a ruin.

The hungry dragon shark swarm is gone. In the icy depths of the sea, Fitz, who is alone, falls into hopeless grief. He allowed himself to drift with the currents, and the yodelers' magic began to dissipate, and finally sank into a long sleep, and a thousand years passed in a dream

It was a complete accident that woke him up. A large fish made of wood swam on the surface of the sea, and a handful of copper coins were scattered on the seabed near the trail.

Of course it wasn't a dragon shark, but Fitz was alert that he didn't know much about the world above it, but surely no fish could live on the surface of the water, so he ventured swim and poked his head out for the first time to smell the salty sea breeze.

There are people, who live beyond the ocean, riding large and small wooden fish back and forth on the water. Fitz was scared and excited, but they threw magical gifts into the water, indicating that they must want to be friends with him.

So, Fitz followed their voyage in time to make it all the way to the port city of Bilgewater.

In the mouths of the inhabitants of that outlawless land, this strange and slippery creature soon became a legendary tidal sea spirit, a spirit from the sea.

He is said to be able to summon huge monsters for his own use, to make holes in the hull of ships with his seastone trident, and to breathe on land as well as in the sea.

Many disobedient children hear the warning when the moon is dark and the wind is high: "Go to sleep, or the sea spirit will catch you and feed the fish"

Fitz isn't bad-hearted, but even by yodeler standards, he's overly mischievous. He loves to play tricks on the residents of Bilgewater.

The most experienced fishermen know that just as the sea ebb and flow, the Tidal Sea Spirit can both keep them in the air and return their fishing boats with a full barn.

Even so, Fitz shows no mercy to the greedy or selfish. Those arrogant captains, bent on making a quick buck, find that their ship has arrived not in a harbor but in a catastrophe under mysterious guidance.