This direction is shown with cards like Laelia, the Blade Reforged and Wild-Magic Sorcerer, or Prosper, Tome-Bound if you add black mana
These dates, found near the cards bottom edge, are often omitted or misused in counterfeit cards
I almost always prefer the former method because if ink gets pulled when you take the tape off, its far easier to patch up a black border than color-match and patch the back of the card and if your sleeves arent opaque on the back, a noticeable paint job will disqualify a card in tournaments (and it is noticeable)
Additionally, Elesh Norn, Mother of Machines and Panharmonicon both cause abilities that trigger from permanents entering the battlefield to trigger an additional time
Note without a second \b at the end, it will still match artifact s