I have read too much mc with dragons, phoenix, tigers, cats, wolf, vampire, saiyan, uchiha bloodlines or companion. so find me something that is not related to any of those myth beast,bloodline.. I want something like Sage Monarch, where mc bloodline is Godmammoth. i mean its freakin ancient elephant. I want something new bloodline or something that main character cultivated, make sure it have special characteristic. For example Sage Monarch: Godmammoth is an holy existence that capable of brewing storms on the rivers and seas, roaring and shatter the heavens, or even plucking the moon and swallowing the sun with a single thought. It even suppress hell and a ruler of hell. you get the point.
Cultivation Chat Group: Spoiler MC's current beast companion is an onion, one of his "students" is a marsh tit and his cultivation technique beast is a whale. One of his "beast friends" is a goldfish/flood dragon mix and the other a pekinese. And it's a story without the harem tag which is nice.
This is kinda tough, as having was is considered a "myth" beast bloodline is somewhat subjective. Also, you don't really set parameters for what WOULD be considered mythical, rather than not, but I digress. I'll try my best. Coiling Dragon (Bebe) Long Live Summons (Lots of unique and bizarre companions, and MC gets the abilities of those pets) Man Huang Feng Bao (Piggy?) Great Demon King (Zombie Pets, as well as a skeleton. MC also has a demonic "bloodline") Legend of the Mythological genes (More sci-fi, but MC has pretty unique beast abilities) Invincible (A cow) That's all I can think of when it comes to "unique" beast abilities/companions. If your looking for something more general, virtually every cultivation novel MC gets a beast bloodline of some sort (ATG, Unrivaled Medicine God, etc) If you're looking for an MC that has a very unique cultivation technique but falls under the category of "traditional", DMWG would be an obvious choice.
Mother of Learning. MC have psychic bloodline, so far he's only known human to use this power to optimum level. His companion is his best buddy and co workers. Edit: I forget to mention Princess, she was divinely enhanced hydra.