Magic Conversion Rate

Hardcore slow-burning story about reincarnation in another world Yang Yifei was accidentally reincarnated into a different world, only to become a goblin who could barely breathe. Through his efforts he discovered that magic existed. However, neon dust, the product of magic, is indeed highly poisonous, but humans do not have this problem when casting spells... After his unremitting experiments, he finally discovered that the conversion rate of magic is not 100%... A hard-core fantasy technological reform article. The setting is rigorous, and anyone is welcome to point out errors and correct them if necessary.