Since it was so iconic during MTG's early days, it's easy to see why it's been able to maintain a lot of its value
The Lost Caverns of Ixalan introduced Map tokens, and a new keyword action, very reminiscent of cascade, thats a favorite among many casual and competitive players
Officially introduced to Magic: The Gathering in 2015 with Magic Origins, menace was brought in as a replacement for the intimidate mechanic, which in turn, was brought in to replace fear
Or Teeka's story should be moved to a much earlier point on the timeline, but I'm not going to make such a drastic revision based on a source as unreliable as the Homelands Document
Dimir Midrange decks in the format can use both Kaito, Bane of Nightmares and Oildeep Gearhulk to fill up, as well as Emet-Selch itself
Playing these three cards in order lets you tutor The Unspeakable onto the field