Killed in One Hit?!

Yi Yeyu dived straight into the fire that the Fiendish Terraflame Lizard spat out but to everyone's surprise, nothing happened to her body. She had only found out about her immunity to fire seven months ago. It was when she had leveled up to a complete gold-level not long ago. Since her combat strength had yet to stabilize, she logged into the Hunter Arena as she had nothing else to do. After a couple of battles, she encountered an opponent that possessed fire elemental attributes.

She thought she would lose but after the intense battle, she realized that the fire-based attacks from her opponent could not harm her in the least. She won that particular battle. After logging out of the Hunter Arena, she attempted to burn her hand with fire. After several experimental attempts and confirming that she was immune to fire, she informed her family about her confounding discovery.