From the official website of the anime Black Clover it has been revealed that the K-POP group TOMORROW X TOGETHER will be in charge of performing the new opening of the series with the song "Eien ni Hikari", which will be part of the single DRAMA that the group will release on August 19th.
This new opening will make its debut with the episode 141 that will be broadcasted on September 1st.
In addition, the group left us a message about the new song:
This song contains the message of 'Shine Forever' like a jewel, overcoming the obstacles over and over again to lead to a brighter future, even if things don't go as you wish.
We hope you will enjoy this opening song, which is similar to the theme of Black Clover, 'Never give up on your dreams,' alongside the anime.
Source: Crunchyroll