It cant earthbend the land it fetches, but you dont want it to: You want to hit a fetch land that you can crack to find a second land, then it comes back into play for a third landfall trigger
In addition, Aethersphere Harvester has Crew 1, requiring you to tap any number of creatures you control with total power of one or more to turn Aethersphere Harvester into an Artifact Creature until end of turn
Brainstorm draws extra cards, then you select some of them, then the ones you selected end up on top of your library in an order that you choose later
Spectacle cares only that an opponent lost life during the turn, not that the opponent's life total is currently lower than it was
Swamp, Mutavault, and Sign in Blood are not really a combo, but Urborg, Mutavault, and Sign in Blood are perfectly great together
Additionally, Sanctum of Calm Waters and Sanctum of Shattered Heights allow you to discard extra copies of Shrines you draw for value