The End of the World: I Am Not a Tentacle Fairy

I died under tentacles in my previous life, but in this life... I want to get the most poisonous tentacles! Variant fusion genes? Come on, jellyfish, octopus, I want them all! After merging genes, it becomes soft and has no strength at all? Then learn the immortal cultivation technique again, make a long hair into a magical weapon, add some sword skills to the whip technique, and incorporate a little mystery... As long as I'm not afraid of burning my head, it's very powerful. (The end of the world of Zahui has been completed in terms of archives. There are only 280,000 words of short and medium stories, so don't hold on to them. The short and short ones will be published soon)