There are two printed versions of Shadowless cards first editions can be identified by the First Edition symbol under the bottom left corner of the art, while second editions, while still Shadowless, do not have the same mark
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Surveil lands Mana with an upside Meticulous Archive, Undercity Sewers, Raucous Theater, Commercial District, Lush Portico, Shadowy Backstreet, Thundering Falls, Underground Mortuary, Elegant Parlor and Hedge Maze are a new cycle of lands that should do a lot of work in every format
This interface only comes up where it makes sense to freely add cards, so you'll see it in normal Constructed, but in Limited or Singleton events, it only works on the lands
They didn't feel red and green
You may reveal an Equipment or Vehicle card from among them and put it into your hand