1) When you attach Queen Cercei's Chambers to your House card, is it an attachment (and not a location) for as long as it remains in play, or does its ability only mean the card can be played like an attachment, making it a location-attached-to-a-House-card?

2) (Okay this may not technically be a "rules" question, more a design question, or maybe strategy, maybe existentialism, I'm not quite sure, but anyway...) What is the "purpose" behind the Kingdom cards? Take the abilities of Bay of Ice and Kingdom of Shadows ("kneel all cards named ~THIS~, then draw a card" / stand a ninja): Why does it matter that every Bay of Ice is knelt in the middle of every 'choose and reveal' Plot phase framework window? Couldn't the card just say the winner of initiative draws a card? And what's with the unique frames (unprecedented, excluding the minor tweaks to Rhaegar and his harp)? Inscrutable abilities and unique frames make me feel like I'm missing some bigger picture.

Eunomiac said:

1. It remains an attachment until it leaves play. In this game when a card changes type it is solely the new type and remains that type until something specifies another change. Also, I am not aware of any effect that can make a card have two different types simultaneously (though perhaps one exists). If you play a chambers card as an attachment though, it is fully an attachment despite the frame.

2. The "Then" on the Kingdom cards implies that the effect only resolves if the Kingdom card kneels successfully. Thus, if you have multiple copies of a particular kingdom in play, they will all be knelt together while resolving the effect of the first one. That first one will then resolve successfully. All of the other kingdoms will have been triggered at the same time. However, they will have been knelt for the first effect and their effects will not resolve successfully. So for Bay of Ice, a player will draw at most one card, no matter how many copies are in play.

The different frames are just a bit of flavoring. Kingdom cards are still locations as far as the rules are concerned. They all work a little differently mechanics-wise from other locations though. For example, most have the "kneel all together" effect that makes it feel like Kingdoms are unique places (you get the effect once no matter how many copies are in play). Also, Kingdom cards are typically hard to control and feel more like an open region of the realm (rather than some castle that you are holding). Their effect goes to whomever meets the condition, not just to the controller. There are also a number of other cards that have been designed to interact with kingdom cards in a fitting manner, like Mance Rayder who can steal Kingdoms.