Belched forth from a rotting Void incursion deep in the wastelands of Icathia, Kog'Maw is an inquisitive yet putrid creature with a caustic, gaping mouth. This particular Void-spawn needs to gnaw and drool on anything within reach to truly understand it. Though not inherently evil, Kog'Maw's beguiling naiveté is dangerous, as it often precedes a feeding frenzy—not for sustenance, but to satisfy its unending curiosity.
|"If that's just hungry, I don't want to see angry." — Tryndamere|
Kog'Maw was created by the same entity that corrupted The Void in Shurima. It spent most of its first days on Runeterra exploring and devouring most things that he saw. It is slowly being drawn towards Malzahar, the purpose of this pull and what will happen when the two meet are both unknown., being spit out from
Kog'Maw is a bipedal creature with short legs that give way to a small upper body, mostly taken up by his head. He has four eyes, a slightly spiked body, and a cylindrical tongue that Kog'Maw can stick out at will. He has three toes on each foot and is colored blue on the lower half of his body and sand colored on the upper half.
Kog'Maw is a curious creature with baseline instincts and seems to have no personality or consciousness beyond that. It is not known to what extent Kog'Maw is able to understand itself or its surroundings.
- Voidborn: Kog'Maw is a voidborn, a being coming from the void to enter the material realm. Because the Void posses different laws of reality, voidborn have to create new bodies from the matter of Runeterra.
- Eternal Hunger: Kog'maw is constantly hungry, to satisfy his hunger, he can eat anything in existence.
- Acid: Kogmaw can shoot out acid from his stomach. This acid can completely disintegrate any living organism very quickly, which leaves Kog'Maw eternally hungry.
The Watchers are the creators of all voidborn entities, including Kog'Maw,, , , and . All voidborn creatures are part of a collective whose goal is to learn more about Runeterra and prepare for the Watchers' return.
Kog'maw is being drawn toby the Watchers. The reason for this is not known and it is unknown what will happen once Kog'Maw reaches him.
At some point Tryndamere either interacted with Kog'Maw or at least knew of him, as he at some point referred to Kog'Maw, saying "If that's just hungry, I don't want to see angry."