Shortly: After i defend with a character which gets killed, can i defend again with other charecters against other enemies, or are the remaining attacks consired undefended?

You declare a defender for each attack separately as you choose to resolve it. If one of your defenders dies this makes no difference. (Unless hypothetically there was say a shaodw effect which said "If this attack destroys a character, the defending player cannot declare defenders until the end of the round." But no such effect exists)

Great then i have been playing wrong all the time (About 2 years!). Why i didn't ask this before! Well anyway thanks for your quick answer.

So when a character gets killed while defending, were you always treating any remaining enemy attacks as undefended? Man that would just blow you out of the water any time you chump block.

Great then i have been playing wrong all the time (About 2 years!).

I bet you've gotten really, really good at defending! This game just became a lot easier for you.

Oh one question came up in my mind: If i defend with an ally example and then shadow card would kill that ally before resolving the attack, could i use another character to defend? I think i couldn't do so but i just want to be shure of this.

You can't... in that case, the attack would become undefended.

Like GrandSpleen said, there is no chance to declare a new defender. The steps for combat are:

1. Choose an enemy
2. Declare a defender
3. Resolve shadow effects
4. Determine combat damage

Once you resolve the shadow effect, the next step is determining damage, which will be undefended in this case.

I sense an opportunity for some cards:

Event:

Response: After a character defending an enemy attack dies when resolving a shadow effect, exhaust another character to have it replace the defeated character as defender.

For Ally/Hero

Response: Exhaust to replace (as defender) another character who has died when resolving a shadow effect while defending an enemy attack.

I once made a custom hero that said "Response: After an enemy's shadow card is revealed, exhaust [hero] to declare it as a defender against that enemy." It could replace the defender if it was killed or just work like Stand Together (both defending at the same time).

I once made a custom hero that said "Response: After an enemy's shadow card is revealed, exhaust [hero] to declare it as a defender against that enemy." It could replace the defender if it was killed or just work like Stand Together (both defending at the same time).

Or allow you to declare a defender when a shadow effect makes undefended suddenly not such a good idea.

There already extists allies that can take undeffended damage.