Sorry don't remeber what pack she comes from, but the one with while she is particpating in a challenge can't trigger response effects. Okay so what I am wondering is if the claim is taking place afterwards, more specificly can i still use red vengence after battle finishes in which she took place in.

mnBroncos said:

The claim is still taking place afterwards. However, Brienne (this one is in the Martell box and she prevents all opponents from triggering any effect, not just responses) is participating in the challenge until all responses to the challenge have been resolved and moribund cards have physically left play. So, you cannot play Red Vengeance (and you cannot use saves or cancel their responses).

okay that is what i thought thanks

You're welcome. Now you know Brienne's full power, you can love or hate her (or both ).