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Aku no Taizai Collaboration Login Campaign was a login campaign that ran from December 13, 2021 15:00 JST to December 27, 2021 14:59 JST. Players who logged in during this time period received a 2☆ Miku card, The Slothful, Sleepless Widow, and brioche.
![](http://static.miraheze.org/projectsekaiwiki/thumb/4/4e/Aku_no_Taizai_Collaboration_Login_Campaign.png/300px-Aku_no_Taizai_Collaboration_Login_Campaign.png)