If I declare a challange bringing say a Carrion Bird and Eddard and decalre that I'm stealthing let's say their Eddard and they in turn kneel the Grey Wind attachment to kill the bird, does the stealth on Eddard fizzle?

Well, you will have to study the Challenges phase flowchart in the FAQ but in short:

- If you kill the Carrion Bird before Stealth is applied, the attacking player loses the opportunity to use it.

- If you kill the Carrion Bird after Stealth is applied, defenders have already been declared and you will not be able to use the stealthed character for this challenge.

So you can get rid of Stealth if you kill the Carrion Bird just after it has been declared as an attacker but before Stealth/defenders are declared.

That's what I thought, but I just wanyed to make sure. Thanks.