Have played a couple of games so far, read all the FAQ's and rulings but there's still some questions about killing characters:

If you're forced to "kill" a character because you lost a red challenge, can you discard a character from play that has "cannot be killed", or are you forced to select another one that can in fact be killed. I understand that you can select characters that may be killed and respond with effects that can save them (like Arya's direwolf card), but it seems broken to just be able to select 'unkillable' ones for every red challenge.

On bgg, they say the following: "No. You have to kill someone else. If that was the only character you have left, then … no one is killed."

Is this correct? Thank you.

Marginal0 said:

This is correct. A character who has the "Cannot be killed" ability is not able to be killed by any means. They also cannot be chosen as the target of an effect that will kill someone, hence if you have a valid target on table then that target must be chosen instead.

You would have to remove that ability if you wanted to kill that character. Milk of the Poppy is an example that will do that.

To clarify, Milk of the Poppy could only take away a "Cannot be killed" effect if the ability granting "cannot be killed" is printed on the character to which you're attaching Milk of the Poppy. If the "Cannot be killed" is gained through some other effect, it will have no effect.