Alchemist? No, It's a Physical Exorcist.

[Alchemy + Exorcism + Western Fantasy + Not Invincible + Cthulhu + Slow Tempo] "What is the principle of alchemy?" "Understand, decomposition and reconstruction?" "What is the only axiom of alchemy?" "Equivalent exchange" "Then why can you use alchemy out of thin air? You don't use a magic circle?" After awakening, Li Shi'an's left eye glowed red and he threw away the weapon in his hand and used Bajiquan.