for the forsworn conspirancy quest.
Is there any known bug that could prevent me from doing quests or other things? I'm asking because I have found so many bugs during my long gameplay sessions in skyrim that i learned that every action in this game can cause more collateral problems than the desired solutions!

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I will move this now.

The was a little "SPOILER" word right in the title of this topic, anyway.

No bugs I have encountered. This is a boring quest which gives an enchanted set of forsworn armour if you help Malacath or whatever his name is. Better option and way more fun, beastform and eat everyone in prison. Then escape and Silverblood rewards you. Or follow the quesline, get the armor and then kill the forsworn in the city, but that is a little trickier as there are guards and some important city NPCs that also fight them as is the case if you help Malacath and some NPCs may die that you may not wish for.

Do not under any circumstances attack the guards that arrest you. It seems to bug out and add a persistant bounty to you while in the reach and no one will attempt to arrest you for it, just attack on sight.