World Domination Begins with Plankton

Xu Ning, a cook at a seafood restaurant, woke up and found that he had become the most useless plankton in the underwater world. The system actually set a goal for him to dominate the universe... "Congratulations to the host for successfully swallowing the sea snake and obtaining the skill 'Heavy Damage'." "Congratulations to the host for successfully swallowing the tiger shark and evolving shield scales." "Congratulations to the host for successfully repelling the black turtle. The skill book 'Invulnerable' dropped. Do you want to pick it up?"