These liquids are actually life forms

Alexander felt a warm current entering his body from the skin of his arm, circulating through his blood.

The gigantic centipede, upon seeing the Earth's Core Fire disappear, seemed to be filled with rage, opening its grotesque mouth to emit a sharp, piercing scream.

It lunged forward rapidly, its elongated body appearing in front of Alexander.

On either side of its body, it had extremely sharp legs, all reaching out to grab Alexander.

With a forward swing of his right hand, Alexander sent out a wave of energy. 

Dozens of the centipede's legs were severed.

"Sssla..."

The gigantic centipede cried out again, shaking its head and rapidly spinning around Alexander.

Its lengthy body wrapped around Alexander like a rope, attempting to strangle him.

Its deathly embrace could crush even tons of heavy black iron, let alone a mere human.