The Legend of Zelda:Oblivion

Oblivion are melted masses of organic material and flesh that has been corrupted by and infused with Malice. The term Oblivion also refers to creatures made of this horrific substance.

Origin
Originally, Malice could only interact with organic matter in three significant ways: first it could absorb the Force of any lifeforms it touched, which would kill said lifeforms. Second, it was poisonous to living beings. Third, it could reanimate dead creatures, giving rise to creatures such as the Cursed Bokoblins. Beyond that, however, Malice could not interact with the organic matter itself, unless the lifeform is already significantly evil. (One example of this was in Age of Calamity, when Astor was corrupted and absorbed into Harbinger Ganon, rather than just being drained of his Force.)

However, Ganondorf increased the potency and strength of Malice after absorbing the Remnants from the Master Sword. This increased potency includes abilities such as the possession of living beings (aside from possession of the dead or spirits), or the corrosion of organic flesh, dead or alive. This corrosion ability is especially frightening, because it can turn regular lifeforms into nightmarish creatures born of and fueled by Malice.

Creatures of Oblivion are exceptionally dangerous because rather than Malice simply draining a lifeform’s Force, as it previously could only do, Malice can now directly take control of an organism, convert its Force into more Malice, and use its organic material as necessary.

Turning into Oblivion
Typically, lifeforms transform into Oblivion after they have been possessed or controlled by Malice for a couple days, during which the lifeform begins merging with the Malice. This is because the Malice seeps into the creature’s very genetic and molecular code, corrupting and changing it. The Malice also transforms the creature’s Force into more Malice, slowly and painfully draining the creature of its lifeforce. Once the Malice has fully merged with the creature, the creature will violently dissolve into a blob of red-purple biomass and flesh. This resulting combination of Malice and flesh is Oblivion.

It is easier for Malice to corrupt living creatures than dead creatures, since living creatures possess large amounts of Force that can be easily turned into more Malice. However, dead creatures may also be corrupted, but it takes longer. Furthermore, the suffering and subsequent negative feelings that a creature endures during transformation fuels the Malice. Finally, Malice can only transform animals into Oblivion; other forms of life such as plants, fungi and germs are unaffected, but their Force can still be drained.

Oblivion may also directly transform lifeforms into more Oblivion, which is a slightly faster process than the possession/corruption method, but the lifeform must be totally encased by Oblivion while it is being transformed. This method of transformation is even more gruesome, as the lifeform is slowly dissolved while its Force drains into the Oblivion, leaving the lifeform to suffer a state of excruciating agony during the entire process. As with corruption, the creature's agony feeds the Malice, subjecting the creature to a horrifying feedback loop, continually increasing the pain the creature endures until it totally dissolves.

Powers and abilities
Like the Malice it originated from, Oblivion and creatures of Oblivion are extremely destructive forces. The key difference is that Oblivion is Malice made flesh: whereas Malice by itself is just energy commanded by Ganondorf, Oblivion is a sentient biomass that can act independently. Pools and puddles of Malice remain inert, as it is just inorganic material. Masses of Oblivion, however, are much more active, and can move, change shape, and merge or split with other masses of Oblivion.

Additionally, because of the corruptive nature of Malice, any creature turned into Oblivion retains twisted, warped properties of the original creature, especially if those properties are magical or supernatural. It also retains the intelligence of that creature. When Oblivion merges, the new biomass gains all properties and intelligence of its constituents, becoming even more dangerous. Oblivion with enough intelligence can analyze, predict, and counter enemy movements, and may possess enough speed or power to outmatch its opponent. The ultimate goal of Oblivion, though, is its desire to grow larger by spreading its disease and corrupting more creatures.

Finally, as Oblivion is Malice at its core, it may be directly controlled by Ganondorf. When it is controlled by Ganondorf, it glows a bright red, similar to Malice, and the new entity is called an Oblivion Ganon. Oblivion Ganons are similar to the Blight Ganons in that they are puppets, but whereas the Blight Ganons were Malice mixed with Sheikah technology, these Ganons are Malice mixed with organic material. Additionally, Oblivion Ganons can combine with one another, and there can be a potentially limitless number of them, compared to the four Blight Ganons.

Trivia

 * The idea of Oblivion came from Astor being absorbed by Harbinger Ganon's Malice as seen in Age of Calamity, as well as Link’s arm being corrupted by Gloom in the E3 2021 trailer for Tears of the Kingdom. The idea closely resembles the melted Flayed and the monsters made from them in season 3 of the television series Stranger Things, as well as the entities known as SCP-001-A in S.D. Locke’s Proposal of SCP-001, When Day Breaks.