When?

After hearing that the Healer Guardian had a message, Arthur decided to take the conversation elsewhere. Oren was unsure if he should follow or not, but Arthur invited him anyway. The three left the Healing Wards and went toward the balcony. 

"Tell me the message," Arthur said as he stood in front of the railing, staring at the crowds of people around his dome celebrating his victory. Tiara was silent for a short moment and closed her eyes. Then, she opened them and began telling the letter. 

[Dear Friend,] 

[You must be wondering how I have the heart to talk to you after what happened in the previous timeline. I believed that I was doing the right thing, since our enemy cannot be defeated nor destroyed. You proved me wrong.]