1st Anniversary Я (ライバルイベント～Я櫂トシキ～, lirerally Rival Event ~Яeverse Toshiki Kai~) is a rival event in Cardfight!! Vanguard ZERO, first introduced in January 2021.
- 2021: January 1st (13:00) to January 11th (04:59) [JP]
- 2021: April 1st (17:00 PST) to April 11st (23:59 PST) [Global]
- Complete missions, as well as fight against Яeverse Toshiki Kai to get Rival Stamp: Яeverse Toshiki Kai, which can be exchanged for various items.
- By winning a total of 5 fights in Rank Fight or the Fight Training Area, player's are give the opportunity to play against a CPU Яeverse Toshiki Kai.
- Fighting against Яeverse Toshiki Kai is limited to once a day.
Event Exchange Store Items
|Item||Rival Stamp: Яeverse Toshiki Kai||Available Quantity||Image|
|Title Honourific: Test Subject||500||1|
|Gacha Ticket: Triumphant Return of the King of Knights||250||1|
|Gacha Ticket: Dazzling Divas||250||1|
|Gacha Ticket: Seal Dragons Unleashed||250||1|
|Gacha Ticket: Binding Force of the Black Rings||250||1|
|Gacha Ticket: Divine Dragon Progression||250||1|
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