1. if kindly man is taken control by the opponent and killed, will he become opponent's agenda if he has no agenda? and if he has agenda, where will kindly man go?

my opinion: since it's a replacement effect ( replace being killed), it'll become its controller's agenda if he has no agenda and will go to its owner's dead pile if its controller has agenda. 

2. can arya (the narrow sea version)'s ability be triggered when kindly man becomes an agenda?

my opinion: i think not, cause his being killed is replaced.

3. can river raid be triggered by dark star?

my opinion: i think not, cause dark star's ability is also a replacement effect, it is not discarded at all.

1. You're right, the initial effect goes through if a replacement effect fails.
2. Wrong, the initial effect is still considered to have resolved successfully, which means you can pay for Maester of the Sun by discarding Darkstar into play.
3. Same as 2.

that means you can stand Bronn(core) instead of kill House Dayne Skirmisher ,then draw a card?

no killing the House Dayne skirmisher is a cost, if it doesn't die the cost is unpaid and effect is not triggered, aslo he can't be saved as part of the cards ability anyway (i know bronn doesn't save, he prevents dying)

Sulpures said:

1. Controller has no agenda, owner has no agenda: Kindly Man becomes the owner's agenda.
2. Controller has an agenda, owner has no agenda: Kindly Man goes to owner's dead pile (the "as your only agenda," judged from controller's point of view, is not valid).
3. Controller has no agenda, owner has an agenda: Kindly Man goes to owner's dead pile (it tries and fails to become owners agenda, replacement effect "fizzles," original kill destination reinstated)
4. Controller has an agenda, owner has an agend: Kindly Man goes to owner's dead pile. Duh.

thanks,what about Q2&Q3?about arya&dark star.

ktom said:

I can only find in faq "When a card leaves play for any reason, it always returns to its owner's discard pile, dead pile, hand, deck, or shadows area".

If the statement "whenever a card leaves play, it goes to its owner's corresponding out-of-play area" is true, you are right.

Sulpures said:

With The Kindly Man, it is not his being killed that is replaced, but his destination after dying. The way it works is that it is still a kill effect that removes him from play, so Arya can still respond to him dying, but he becomes an agenda instead of hitting the dead pile. As for Darkstar and River Raid, I would have to assume that the same holds true, he has been discarded for the purpose of responses to a card being discarded from the deck (or hand, whichever is true), even though the replacement effect changes his destination. However, I would like confirmation, as I'm not 100% certain that his replacement effect follows the same rule, though I can't see any reason why it wouldn't.

There are two types of replacement effects.

The common type reads, more or less, as "If X would happen, do Y instead." These are usually "disposition" replacement effects that change the way a particular thing resolves without change the definition of what resolves. So, for example, when Darkstart says that if he would be discarded, put him into play, you effectively "discard him into play" instead of discarding him to the discard pile. It still counts as a successful "discard," though, for absolutely all other purposes (like paying costs, meeting the play restrictions of passives and responses, etc.) This is the same reason why, when using Pyat Pree, the identity of the challenge that resolves doesn't change, even though the claim effect for that challenge does.

The rare type reads, more or less, as "If X would happen, do Y instead of doing X." It's a subtle difference, but a very real one. These replacement effects are "complete" replacements in that they not only change the way something resolves, they change the definition of what resolves, too. As far as I know, the only example of this in the current environment is CS-Bronn. If you stand a character instead of killing it because of his ability, it counts as a standing effect, not a killing effect, for absolutely all other purposes (costs, play restrictions, etc.).

The original answers from Khudzlin for #2 & #3 were correct.

ktom said:

Thanks for the explanation, Tom

I have Ser Kevan Lannister(VM) in play,then I use Enslaved control Opponent's Kindly Man

My opponent declare Military, I choose Ser Kevan Lannister to die,then my opponent play Die by the Sword kill Kindly Man

what happen?

I think first play decide,right?

I may be wrong about this.

Kevan Lannister will be moribund:Agenda before any responses can be played.

Kindly Man cannot attach to YOUR house card as an Agenda, since you do not own the card - when cards leave play they go to their owner's out of play area.

So, end result - Kevan is your agenda.  Kindly Man is just dead.

If neither player has an agenda in the first place, the Kindly Man becomes its controller's agenda. Kevan is still moribund, so you don't have an agenda at the time.

But wouldn't Kindly Man become moribund:Agenda after the response is played (and while Kevan is still moribund), so they would both attempt to become an agenda at the same time?

Assuming you're right about a Kindly Man you don't own being able to become your agenda, that is.

radiskull said:

He is right. We've been through this a couple of times before.