mtg space cards MTGNexus forward Borderless layout Island (492) (Orbital Space-ic Land)

As for signatures

Eight mana is a lot, but if you've ever had an Eldrazi ConscriptionEldrazi Conscription hit the board and immediately swing in, you'll know that it's costed correctly

There's a hilarious game where pro player Brian Braun-Duin was playing Nadu at a Nerd Rage Games event and presented the combo, but his opponent was just like, "All right, combo off and kill me." And BBD proceeded to spend the next hour seemingly aimlessly looping through his deck

This makes identification within a group easy as Alternate Fourth Edition cards darkly stand out from standard Fourth Edition cards with a UV light

Finally, because Clues are artifacts, they pair perfectly with general artifact synergies