Your white cards can do this through multiple waves of mass removal, tons of stax-like prison effects, and destroying every single one of your opponents artifacts and enchantments
The question becomes: is Nyxbloom Ancient too strong
Exile a permanent, tax your opponents mana, and get back the best creature or Planeswalker in your graveyard what more could you ask for
Third, the delay creates drama, a quality that I have respected more and more as I've advanced as a designer
For one thing, you can treat it as a graveyard-oriented way to rebuy an enters trigger
1 in every 4 packs (give or take) contains a 13th card from this special list of cards in place of an advertisement or token within the pack (not counted in the 12 cards), and while some are dud commons that tie in with a sets theme, others can be quite valuable