Well, perhaps they agree that there is a point where a deck can have too many Pain Lands and Fetch Lands freeing up a few slots for Filter Lands and the strong mana fixing they provide at the cost of 0 life
Put it on a Stick
Sets that primarily take place there : Innistrad , Dark Ascension , Avacyn Restored , Shadows over Innistrad , Eldritch Moon , Innistrad: Midnight Hunt , and Innistrad: Crimson Vow Planeswalker natives (with planeswalker cards) : Arlinn, Sorin, and Tibalt Innistrad is a plane inspired by the horror genre, especially the subset of gothic horror
Grub can't have all the good cards
Its absurdly undercosted, and it synergizes with tons and tons of stuff like Delirium, adding two types at once, including a hard-to-find one
Its already down to $3 for the cheapest and $20 for the FEA, prices I am content at but Im waiting a bit longer for hopefully a farther fall