This is heavily inspired by 'A Game of Grimm Consequences' from rapthorn2ndform.

It knew very few things about itself and the world around it. It was a being of destruction, but also possessed a smidgen of creation, spawned from a whim by the brother of Darkness at his leisure. It did not actively seek out to destroy humanity like its kin but enjoyed the taste of their negative emotions and found itself hiding on the outskirts of civilisations where the conflict is greatest. For many years the bird-like being soaked up the darkness within humanity without threat or injury to itself, and flourished with quality instincts for survival unlike many of his fury and hatred born brethren.

Wanting to get closer to these emotions, the being flew closer to the human nest unit it was shot and blasted at with sharp sticks and magic. It felt the negative emotions slowly rise but quickly departed back to safe territory. It learnt that even just witnessing its presence will make the humans uncomfortable. Coincidently, the unexpected spike of emotions was enough to gather the attention of more gimm, feeding the loop until the last of the grimm were slain. This made the being excited; if it could replicate this feat, it could feed whenever it wanted too!

The very next day it flew back towards civilisation, this time much more wary of incoming projectiles. It could immediately tell when it was spotted because of the confusion from on top of the walls. It warily 'paced' from one tall perch that was imbedded into the wall to the other, far enough away to be seen but proved useless to be shot at. No grimm came to investigate this day, but it still fed more than he would on a regular day. It would be doing this again.

Eventually over the coming years, the humans had been desensitised from its presence and was offered a small degree of trust to not attack them. It felt disappointed that the wall specifically did not give off near as many emotions as it once did to its presence, but was happy overall that its objective had been complete and could feed off the humans it could not see. The humans constructed some type of fake tree for it to sit on that was literally on top of the wall near a watchtower specifically for it. Only because it allowed it to have it's back to the wall and the ability to fly off whenever it wanted was the reason it actively used it.

Different types of humans came up to see him when he made the perch his permanent residence. Unfortunately, over the years, humanity that lives within this civilisation do not give off any negative feelings from its presence anymore, apparently appropriating enough trust to completely disregard it as a threat. Not that it really cared, the battles still raged on and humanity still harbours the darkness inside of them. It had found the perfect perch to feed off of emotions in a relatively safe location where now lived.

Many years passed without the being knowing what to do except think and observe. It had already completed its self-imposed purpose; to feed off of as much negative emotions as possible without dying. It began to evolve and assemble thoughts; why do I feed off negativity? Why is humanity so tasty? What do humans feel when I cannot detect them? For what purpose did my creator create me? Why are they looking at me? These questions and more were swimming through its mind, never answered but always remembered. That's not to say it was never attacked before, some humans needlessly attacked it and forced it to fly into the forests for safety.

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Something interesting was brewing within humanity, its darkness was being nurtured and fanned to become greater to what it once was. The being was more than okay with this, and if it happened as early as a decade ago, would not care how or why this changed occurred. But it has grown, not physically, but in mentality. It wanted to know how and why this change was happening, and find out if its effects could be recreated for its own purposes. It seemed that the vast number of foreign warriors made the civilisation inside the walls feel negative, but was nowhere near as negative as the outside warriors. But what really stood out was a lone female human. She had blond hair, light teal eyes and the highest amount of negativity it's ever tasted in a single human.

It watched her walk into were the least negativity could be fed from. Three hours later the negativity increased greatly! This was a wonderful discovery! This human left cold feelings from almost everyone she interacted with. It followed the human for months, using it's superior eyesight and learnt stealth to hide its presence until her and a very large amount of humanity started marching. It obviously followed such a large amount of negativity.

It followed them for months to a sacred place that it instinctively knew that it was not welcome. The being's survival instincts pounded against it's head like crazy and smartly did not follow the foolish humanity to their deaths. No matter the amount of negativity was worth its own assured destruction, so it lazily flew around the territory of the brother god of creation's home. Until the brother of Destruction, in all his dragon glory, flew over his head into his brother's territory. It was this moment the spawn of destruction knew, that humanity fucked up on an unconceivable scale.

It flew fast and hard. No lazy or casual flying, it flew with not a movement wasted and, in a haste, not unlike in its early years getting shot at by humanity. The being liked to think it was the smartest creation that Destruction has ever created, and even it knew that mass humanity marching towards their creator looking for a fight would be like itself trying to enforce its dominance over the god of Darkness. It was a futile death sentence and it did not want to perish because of the stupidity of humanity.

It was so sudden that it did not even realise the purple sphere of pure destruction until it was within it's grasp. Its vision was tinted purple for a short amount of time before it receded. It felt… different. Not a bad different but like something deep from within its being was about to burst out it's chest. It landed in alarm, hoping against all odds that it was not doomed like humanity surely was. "BOOOOOOOOMMMMMMMM"The loudest sound it ever heard occurred and it whipped its head upwards and stared in absolute fascination and awe. The big glowing, white circle in the sky was BROKEN. Its creator just shot the sky into pieces!

Name - ?

Species - Grimm (Raven)

Negativity - 356, 233

Level - 125

Strength - 15

Agility - 27

Perception - 58

Resistance - 25

Stat Points - 0

+1 Stat Point == +1012 Nega

+1 Ability == + 50, 350 Nega

Abilities

Observe – Gather information on living beings (Level, Species)

Feather Attack – Throws deadly sharp feathers from wings for piercing damage

A slew of information entered its mind. It knew that humans had different types of negativity; hate, envy, depression, guilt, grief, fear, shame, despair, rage, sadness, disappointment, frustration, disgust, confliction, pity and hurt. Each emotion grants 0.1 negativity / person*hour within perception distance. This was a final gift from our creator, only the gimm alive now have received this gift.

Congratulations for reaching level 50

Pick one ability to acquire

Metamorphosis, Camouflage, Tracking, Silence

If the being was being absolutely honest, it had no idea what any of those 'abilities' even was. So, it just chose the one at the end. Completely ignoring the chunks of sky falling towards the earth.

Silence – Wings and body make absolutely no sound when flying

Once the being understood what this meant, it got excited. This could help it avoid detection in the future.

Congratulations for reaching level 100

Pick one ability to acquire

Battle Cry, Crushing Talons, Death Dodge, Tail Swords

It picked the one on the end because it had worked once before.

Tail Swords – Tail feathers have been sharpened and can be used like a great sword

Without even hesitating, the Raven Grimm slammed his tailfeathers into a tree and felt the satisfying sensation of it cleaving through. It took off lazily in the air once more, deep in thought. It might as well use the rest of his Nega, there was no advantage to hording it so it brought a skill point, and observed the changes.

Negativity - 355, 221

Level - 126

Stat Points - 1

+1 Stat Point == +1022 Nega

It seems that every Stat Point it buy's increases it's Level and increases the cost for the next point. It kept buying Stat Points until another window popped up.

Congratulations for reaching level 150

Pick one ability to acquire

Camouflage, Tracking, Smoke Screen, Metamorphosis

Tracking – Mentally mark a living being and follow them to the ends of the earth

It sucks that there are no more humans to feed off of anymore but this does present an opportunity. There was one thing it really wanted to do but never gained the courage to try it until now… DESTRUCTION OF HUMANITIES CREATIONS! Perfect stress relief and target practice to fill it's time until humanity rises again. It's in for the long hall.

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Name - ?

Species - Grimm (Raven)

Negativity - 327, 933

Level - 150

Strength - 15

Agility - 27

Perception - 58

Resistance - 25

Stat Points - 25

+1 Stat Point == +1262 Nega

+1 Ability == + 75, 350 Nega

Abilities

Observe – Gather information on living beings (Level, Species)

Feather Attack – Throws deadly sharp feathers from wings for piercing damage

Tracking – Mentally mark a living being and follow them to the ends of the earth