The theme song of the Demon Patriarch is "Wu Forget".

"Wu Forget" is a song sung by Jane Zhang. It is also the theme song and ending song of the animation finale of "The Master of Demons". It is composed by I Am Y, Ran Yi and Ye Xiaomo, composed by Zhong Wanyun, and composed by Terence Arranged by Teo, it was released as a single on August 14, 2021. The theme song "Wuwang" of "The Master of Demons" instantly brings the audience into the world of "The Demons". Overcome countless disasters and stay with us for the rest of our lives. It is not only a real-life portrayal of Wei Wuxian and Lan Zhan from childhood to middle age, but also the best ending for them.

Jane Zhang is a proper diva, with a sweet yet majestic voice. Even though it only has the climax of the song, I was already hooked after listening to it. It’s super nice to listen to. When the lyrics reached "together for the rest of my life", the picture played was of Lan Zhan holding Wei Ying's hand. Wei Ying's hands and clothes were covered with scars, but Lan Zhan didn't mind at all and held Wei Ying's hand firmly. This was the true sign of never leaving.

The white clothes reflect the black clothes, and they merge into a melodious song; leisurely watching the sunset, it is better than countless people in the world, and the troubles have nothing to do with it. The lyrics are full of ancient charm, which is a style favored by young people nowadays. The lyrics have a strong sense of imagery. Listening to the music, it feels like you have seen all the beautiful scenery in "The Magic Way".

Lyrics of the song "Unforgettable":

Yan in front of the hall, we have gone a long way and we will know when we will return. Playing the string music and thinking, when will the old friend return? Who is sighing sadly, There are many scattered rivers and lakes, and the dust has settled, and there is no pleasure for a while. A glass of wine facing the green mountains, the boat is stopped and the moon is getting late, the clouds and mist rise on the grass bank, and the world appears leisurely. Whoever plays the flute, the past is gone, reincarnation is indifferent, the old love and old dreams cannot be exchanged for a thousand pieces of gold. May I never forget how many times I searched for you, traveling through mountains and rivers, searching for the joys and sorrows of several lives. I was surprised when the lights were dim, and I made no waves without the wind. I survived countless disasters and stayed with you for the rest of my life.

The white clothes reflect the black clothes, and the music is melodious. Watching the sky at dusk is better than countless people in the world. The turmoil has nothing to do with it. Swallow in front of the hall. It has been a long journey and I know how to return. Playing the string music and thinking about it, when will the old friend return? Who is sighing sadly, the rivers and lakes are scattered, the dust has settled, there is no pleasure for a while, a cup of wine is facing the green mountains, the moon is getting late in the boat. The clouds and mist rise from the grass bank, and the world appears leisurely. Whoever plays the flute, the past is gone, and reincarnation is indifferent. The old love and old dream cannot be exchanged for a thousand dollars. I hope I will never forget how many times I spent with you.

Traveling through mountains and rivers, searching for the joys and sorrows of several lives, I am surprised when the lights are dim, and I miss myself when there is no wind. I have overcome thousands of disasters and are by my side for the rest of my life. The white clothes reflect the black clothes, and the song is melodious. I look at the dusk in the sky and watch the countless things in the world. The turmoil has nothing to do with it. I hope I will never forget how many times I searched for you. I traveled through mountains and rivers, searching for the joys and sorrows of several lives. I was surprised when the lights were dim and I made a mistake. There is no wind and a slight ripple rises. We will survive countless disasters and be with each other for the rest of our lives. The white clothes reflect the black clothes, and the music is melodious. Watching the sky at dusk is better than countless human beings. The troubles have nothing to do with it.