"Poison!"
Zephyr shouted with a tone filled with shock and disgust as he felt his body warning him of something foreign and dangerous in his system.
He quickly jumped back, escaping from the range of Old Man Poison's staff.
His eyes glowed with a bright orange light, and he observed his body. His vision changed to an infrared vision, and when he observed his body, he noticed a black substance subtly spreading around his internal system.
'If my body wasn't so sensitive to my internal heat changes, I wouldn't have known about the poison, and I would have died about thirty minutes later.'
Zephyr calmly thought, then he glanced at Old Man Poison, who calmly twirled his staff with a slight smile.
"People like you truly disgust me. You can never defeat an opponent with your own strength, and you have to rely on a cowardly thing like poison."