Is the Summoner Weak? Sorry, I'm the King of the Bugs

Xiao Yu traveled to a world where spiritual energy was revived and everyone changed careers. When people here turned 18, they could all awaken to their own careers. He likes warriors, but unexpectedly changes his profession and becomes the weakest summoner. The first summoned object is the mosquito that can be seen everywhere. I thought I could only live in confusion at the bottom of society for the rest of my life, but the system appeared. First-level mosquito dies, life +1 First-level mosquito dies, life +1 … Summoning a mosquito costs 0.1 Life points, and the death of the mosquito adds 1 life point. Who said there is no perpetual motion machine in the world! Attack system, defense system, auxiliary system... How Xiao Yu cultivated his own Zerg army step by step. … A few years later, the Abyss Demon crawled out of hell. "Excuse me, have you bought insurance?" Xiao Yu waved his hand, and there were 100 million tenth-level world-killing mosquitoes.