The Black Clover mobile game, Black Clover: Phantom Knights from Bandai Namco Entertainment ends service on 9 December 2020. Both the global servers – which lasted about 9 months – and the Japanese servers – lasting around 2 years – will simultaneously shut down.
The full notice in-game is given as follows:
We regret to announce the closure of Black Clover Phantom Knights. Thank you all for your support and we hope you enjoyed playing. We will be keeping the servers open until 12:00 JST December 9th, 2020, so please continue to enjoy Black Clover Phantom Knights until the very end.
Apparently, before it ends service, those who decide to pick up the Black Clover mobile game now, you will be able to farm for unlimited ticket draws for a banner containing all the units released, so you can have some fun doing rolls if you so wish.