Rainn felt even more pain as his body convulsed on the cold floor of the apartment. He knew the consequences of drinking the vial of blood. But it can't be helped, to become stronger he had to drink it.
"AHHHH..."
Rainn even choked and couldn't make a sound to scream. The effect of this Undead blood vial was indeed greater than the giant scorpion.
Rainn didn't know how long he had been convulsing on the floor. Once the pain was gone, Rainn realized that he was now in the middle of a pool of his sweat. What's more, his sweat gave off a pungent smell like something rotting. Rainn stood up, wincing at the smell.
He quickly wiped the pool of sweat off the floor. After that, he goes to the bathroom to take a cold shower. The cold water that splashed him took away all his tiredness and pain.