Martin, the level 117000 Atlantean, is certainly a meme. But is he cannon? To be honest i kind of don’t know whether or not he could be. Considering cursebeard and the other unknowns are said to be over level 1mil (iirc), it doesn’t seem out of the question something like Martin could exist in the dark sea. And I assume most of the enemies in the game are canon, considering how some of them have to be fought for story.
If he is he better be on mimhere island canonically too.
If a shark can sit in the war seas and absorb magic pollution until it turns into White Eyes, then an atlantean can sit in the most polluted section of the dark sea (far reaches, maybe even mimhere island) and absorb magic pollution until it becomes Martin.
Little is known of the eldritch horrors that resides within the obsidian desert we title “The Epicenter”, whatever level it may be, I beg of thee vetex… Bestow upon the most ancient and powerful of these unholy beasts the title of “M̷̨̛͔̥̝̙̟͇̬̬̝͚͌̔̈́̽̉͝ ̶͚̘̠̬̆̆͌̈́̒̔̎͐̕̚͝A̶̞̳̜̪̮̖̞̔̎̽̏̒͜͝ͅ ̴̡̧̧̥͓̮̻̩͈͎͍̜̩̫̽̑̈́̓́̇̈̏̿͂͛͐̋̚͝ͅŖ̸̯̣̜̞̝̤̫͂͆̓̈̀͂̌̆͂̆̀̾͊̅͠T̷̢̰̞̳͕̻̫̦͙̤̔̐͗̅͗̽͜͝ͅ ̴̨̛̱̠͚̩͎̘̖̺̓́̃I̴̧͔͕̘̘̘̪͔̽̈́̊̀̍͝ ̴͓̹͔̬͔̺̓̈́̅̉̒̕N̴̢͓̰̱͚̓̏̿̍̐̈́̓̓̓̀͐̔̑̈.̷̡͙̻̟͑͂̾̎̊”