PSA: Hold off on “Unowned Card Series 4/5” until after series drop on March 4th

Assuming you are missing at least one of the cards dropping to series 3 (review screenshot), wait until after March 4th to buy the “Unowned Card Series 4/5”. This will guarantee that your new card isn’t among the group dropping to series 3. The event is until March 11th so plenty of time to buy in the shop after the 4th.