Entomb effects are distinctly different than self-mill cards because you control which cards are put in the graveyard rather than putting random cards from the top of your library into the graveyard
Treasure Hunt (C18-109) - Commander 2018 Treasure Hunt (C18-109) - Commander 2018 Wizards of the Coast NOT LEGAL Standard NOT LEGAL Future LEGAL Historic LEGAL Timeless LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Explorer LEGAL Modern LEGAL Legacy LEGAL Pauper LEGAL Vintage LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl LEGAL Brawl NOT LEGAL Alchemy LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern LEGAL Predh Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.
Even though Tier 1 staples like Tarmogoyf and Dark Confidant have leveled off or increased in price, many of the other staples have taken quite a hit from the sets release, especially uncommons and rares that derived part of their price from casual play and just plain scarcity
Stories of super-valuable cards entice and entertain newcomers and tempt old-timers with the idea that somewhere under their bed could lurk hundreds of thousands in cardboard credit
Rise of the Floodborn - Amber and Sapphire Best cards: The Queen, Commanding Presence
That means writers have to create themes because they are presenting ideas
