INTOLERABLE

When she heard about the pain, Catherine subconsciously flinched. She didn't want to die painfully. She wanted a peaceful death. 

"It will be the most unbearable pain you ever had," Veronica mentioned. "It's also a test. If you can't bear the pain and let go of Sebastian's hand, the life force will come back to you."

Catherine gulped. "Why is it so complicated?"

Veronica stated, "That is why it is a test. It tests how much you love a person to go through the pain and give your life away. It's not an easy thing to do."

Chills ran down Catherine's spine. Her heartbeat rapidly increased. She was scared and nervous but didn't want to show her emotions in front of Veronica. 

She was also afraid that her friend would stop if she showed a bit of weakness.

She took a deep breath, trying to calm her heart. Afterward, She mournfully looked at Sebastian's pale face.