Tsukasa has learned about the cave where the nitric acid is collected. The race is on between Senku and Tsukasa to restore humanity in their respective visions.
So the "miracle fluid" is nitric acid.
.السائل المعجزة هو حمض النتريك إذًا
El líquido milagroso es ácido nítrico.
El líquido milagroso es ácido nítrico.
L'acqua miracolosa è acido nitrico?
Então o "fluido milagroso" 
é ácido nítrico?