Question: Did I miss a Pyramid key in here?

[Isaac]

There is a room with a pressure plate; very suspicious looking, so I triggered it from outside the room... and...

SpoilerShow

It locked the room, and released undead in there... but there is no way into the room now.



There is a secret button; presumably to open the door once closed, but no way to enter the room from the outside once the door has shut.

So I have been all over the rest of the accessible areas [including the secret room seen marked with the X on this screenshot], but that's the only place I know of that I cannot reach, and I've only found one of the two pyramid keys for the front hall.

*I'm not asking for tips, just a knowledgeable assurance that not being in that room when it shut is not map breaking.

[minmay]

First of all that's hilarious.

There is not a key in that room. It only contains a torch, 3 giant snakes, 2 mummies, and 10 pellets.

The tomb key for that side is

SpoilerShow

in the alcove at the top left of your screenshot.

[Isaac]

First of all that's hilarious.

There is not a key in that room. It only contains a torch, 3 giant snakes, 2 mummies, and 10 pellets.

The tomb key for that side is

SpoilerShow

in the alcove at the top left of your screenshot.

Thanks minmay!

If I remain stumped for another night, I'll come back and read the spoiler.