Is That Monster a Senior Brother?

Fang Yi traveled to the world of immortal cultivation and was picked up by a female cultivator from the sect when he was young. He became the lowest servant in the sect. For more than ten years, he has been huddled in the alchemy room, cleaning up the medicine residue, pretending to be transparent, and living cautiously, for fear that one day he would be used as cannon fodder. Until the senior brother was sucked in by the master, and he was sold to the senior sister. Fang Yi knew that he couldn't escape this time. When he was desperate, the dog system that had been with him for more than ten years and could only tell the word "surprise" finally revealed a real surprise—— Black liquid, venom is coming. After merging, the strength, defense, and speed are all increased, and the injuries are healed instantly. The black slime can be shaped at will, and armor and weapons can be formed with a single thought. It has its own storage space and can permanently copy the genetic memory and abilities of the devoured former host. The most outrageous thing is that it swallows and feeds back - spiritual stones, pills, it swallows everything until nothing is left, and after swallowing, it pours it into Fang Yi's body. While others were forced to meditate and practice hard, Fang Yi, who had low qualifications, lay down and slept, and his cultivation level skyrocketed like crazy. ………… When the person who bullied his junior sister thought he was just a submissive loser. What greeted him was a monster two meters tall, covered in black mucus, and full of fangs... "Don't you want to practice dual cultivation?" "What a coincidence, my pet likes to fuse with people..." Fang Yi's voice came out from the monster's body, hoarse and cold. "Ah! Monster... He's a monster!" Junior Sister: What kind of monster? That's my senior brother!