The Creative team said they weren't staffed to create two planes in a single year (something we're equipped to handle now), so they suggested a story where something happened that was so impactful that it would allow for the complete shift in Zendikar's mechanics
Other Cards from Battle for Baldur's Gate Blood Money is a key mass removal spell for this build since it destroys all dorks, for one more mana than I'd prefer, and makes a ton of tapped Treasures for future turns to use to cast your exiled dork while equipping, dropping removal, using Vorpal Sword, and loads more
If you're getting the whole Secret Lair, though, expect the foil set to be more expensive
9 Unlicensed Hearse One of the best pieces of graveyard hate, Unlicensed Hearse continuously grows in its stats while it exiles cards out of graveyards
While all of the other cards fit into obvious themes from Aetherdrift, this card seems more generic