pokemon phantom gate booster box Japanese Pokémon Pack Phantom Forces expansion Opening a Pokemon Phantom Gate

That's the difference between knowing you have 9 ramp sources (one short of the baseline) and knowing that three of those sources are conditional on your commander being in play, making your reliable ramp count closer to 6

Like most Magic: The Gathering cards, the value of Enduring Curiosity depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Duskmourn: House of Horror)

Seems massive

While this seems like a lot compared to the number of rares printed, it is still dwarfed by the number of cards printed in every other set

While they take a little more work than a traditional tutor like Demonic Tutor that put the card directly into your hand, its easy enough to build around them that entomb effects often become critical pieces of reanimator and other combo-adjacent decks

Keep in mind that this underplayed Aura isnt a perfect counter to removal, as board wipes and exile effects are still plentiful