Which is probably its entire planned business model, come to think.
Due to how useful it is in so many decks as a Spell card that can search for any Field Spell, Terraforming has become limited, restricting you to using only one copy per deck in the Advanced Format
When fewer copies of a certain card exist, each one that is found becomes more desirable and worth more
If theres no way of knowing for sure whether a card you buy was actually printed by Wizards or not, it becomes easy for all of us to cross that line and impossible not to
These bundles rotate seasonally and sell out quickly, so check regularly
With no restrictions as to level, monster archetype, or even attribute, Foolish Burial can send whichever monster you need to your graveyard so it can trigger its effect