Attack of the Tetriminos!
Attack of the Tetriminos! (テトリミノ来襲！ TETRIS SMASH, Tetrimino Invasion! TETRIS SMASH) was a Spirit Board event focused on spirits from the Tetris series, which featured Tetriminos as spirits. It ran from 6 a.m on October 25, 2019 to 6 a.m. on October 30, 2019 (UTC). During the event, defeating Spirits on the Spirit Board which were part of the event awarded more Gold than usual.
Randomly appearing spirits