That is where Ichormoon Gauntlet comes in
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Grandmother Sengir is Baron Sengir's crazy grandmother, which I suppose makes some nice thematic sense with the 'old noble family' vibes that many vampire fiction has
Thankfully, since then, demand and prices have somewhat stabilized
There's no reason to
Since then, we've seen a wide array of subtypes emerge: Fortification (2007), Gold (2008), Vehicle (2016), Clue (2016), Contraption (2017), Treasure (2017), Food (2019), Key (2019), Blood (2021), Attraction (2022), Powerstone (2022), Incubator (2023), Map (2023), Bobblehead (2024), Hat (2024), Junk (2024), Scrap (2024), Scythe (2024), and Spacecraft (2025)