Now worth $7,000
If you're trying to build the deck as cheaply as possible, you can cut the Castle Locthwains to save three rares, but the land is extremely powerful and pretty close to a free-roll in a deck playing 21 Swamps, so it should always come into play untapped
And I'm sorry this took so long to post as well, but I also received the second half of my spring secret swap
Its the red Delver of Secrets, where the trigger is putting cards in the graveyard rather than revealing an instant or sorcery from the top of your deck
Land cards with basic land types have intrinsic activated mana abilities associated with those types
Creature - Human Detective Interaction (CTRL to add secondary) Land Spinerock Knoll Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped