Did we play it right:

If i play KoS and my opponent wins a intrigue challange, is he allowed to knell my KoS to stand his Varys (Shadow)?

If right, can anybody explane the rule definition and if possible an other example?

Sure, he can. Just read Kindom of Shadows' text: After a player wins an Intrigue challenge, that player kneels all copies of Kingdom of Shadows to choose and stand a card with the Shadows crest.

He wins an Intrigue challenge against you so he kneels all copies of Kingdom of Shadows (if he's not able to kneel all of them, he can't stand a shadows card) and gets to stand a card with the shadows crest. "A card" means any card, not just the ones you control.

He actually must. You don't have an option to trigger it. The first person to win that intrigue challenge must do it. If you are the only player with a knelt Shadow-crest card, he must stand your Shadow-crest card for winning the intrigue challenge.

The card effect of Kingdom of Shadows creates a persistent (passive) effect that is always active. The effect is such that any time a player wins said intiruge challenge, they must then resolve the remainder of the effect (standing a Shadow-crest card). There is a cost associated with this (kneeling of all Kingdom of Shadows cards). If the cost can not be met because there is a Kingdom of Shadows card already knelt, the effect does not happen. Thus, in general, the effect will only be triggered once per round (there are ways it can happen multiple times, but in general once).

Another example is Bay of Ice. The person who wins initiative draws the extra card no matter who the person is.

The thing to notice is, indeed, that Kingdom of Shadows is a passive effect that activates when a player (not "you") wins the INT challenge. As a triggered ability, your opponent wouldn't get to "use" it, but as a passive, it happens whether anyone wants it to or not.

mdc273 said:

Thx - good and satisfying explanation - thats what my opponent told me

Hah. I just beat KTom to it. He's considered the real rules authority. <.<

Thx, though!

mdc273 said:

Shouldn't it also be noted in this thread that you can 'stand' an already standing shadows card?

dh098017 said:

The original question was really about the nature of the passive effect, and how it essentially breaks the rules, allowing someone who doesn't control the card to use it to pay a cost. The fact that you can choose to stand a character that is already standing without violating the play restrictions of this card is a strategy and usage point well outside the scope of that question about how it initiates, and by whom.

In this game, answering questions that have not been asked - particularly ones that are only indirectly related to the one that was was actually asked - tends to lead to more confusion than is necessary.

So sure, it makes sense to bring it up as a related subject, but I think it would be overkill to include it in the original answer. (I knew someone would bring it up eventually, though. )

I think he brings it up because I referenced it in my explanation so it clarifies something I had technically not made clear. I'll edit my explanation.

Or it won't let me... Oh well >.>