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And this enables some pretty strong combos, like a single Grindstone activation milling your opponent's entire library, which is pretty broken

Black decks can find ways to drain the life out of opponents while keeping you healthy

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Then you can play another land on your turn for landfall

Creature - Wizard Vampire Blood Token (CTRL to add secondary) Creature Marionette Apprentice Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.) Whenever another creature or artifact you control is put into a graveyard from the battlefield, each opponent loses 1 life