Weird that a spell called "Break Down the Door" doesn't have anything to do with unlocking Rooms. In fact, you could use it to exile a Room, making it less unlocked than before.
Someone in a Discord server I'm in pointed out that this is a potential turn 4 kill with Bloodletter of Aclazotz. Requires the opponent to have no removal or blockers, but still.
Duplicate of Wary Thespian aside from the creature type. A fine draft pick with no prospects for Constructed.
Maybe (probably) I'm missing something, but I don't understand why you'd want this effect on a Leyline, since you can't use it in the early turns of the game. At best you can spend turns 1 and 2 ramping and then cheat out one expensive spell on turn 3, and maybe that spell is some Eldrazi or other, but is that really a better plan than the existing Sneak Attack or Goryo's Vengeance decks?
I've got an Azorious Flash deck for Standard in which I'm currently running a 2-2 split of Malcolm and Plumecreed Escort because neither of them are exactly what the deck wants. This might be worth an audition... although the lack of flying is a strike against it.
I initially read this as "Whenever an enchantment you control enters a room". Shortening "enters the battlefield" to "enters" was weird enough, but it's extra weird now that they're introducing something else that could conceivably be "entered" in the very next set.
So the opportunity cost of including, say, Floodfarm Verge in a slot where you would otherwise be running a Plains is low but not nil. Considerations:
Overall I think I probably like these better than most of the rare duals that are currently in Standard, although that's "like" in the sense of "want to play with"; I'm not necessarily saying they're stronger in the abstract.
Interesting to note that the cycle depicted here is only allied colors and only goes clockwise (on the color wheel) when adding the second color. There is potential for three more cycles like this one if Wizards wants to make them.
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