Given how easy it was to acquire, there are likely quite a few copies of the card in the game, although there are two things that help to contribute to its rarity
Deck has two main ways to pressure opponents
Easy Handling: Sleeves make shuffling and handling cards smoother, improving your overall gameplay experience
Every Devil token packs a one-damage sting in its forked tail, which pairs particularly well with Ixalans mono-red God, Ojer Axonil
A third Gandalf the White causes abilities to trigger four times, a fourth causes abilities to trigger five times, and so on
If a face-down creature dies but the permanent card it becomes in the graveyard leaves the graveyard before Yarus, Roar of the Old Gods's last ability resolves, it will not return to the battlefield