1. Can't re-enter O'dims world to claim the Legendary venomous viper silver sword :( And no diagram for it..
2. If you choose Hjalmar, you can't explore all the "?" in the world due to to the one in Khaer Troldes basement (Place of power)
3. Respawning monsters appropriate to your character level, killed everything in the game that i can find, still level 69.

1. That is something that isn't broken in my opinion. It's the best sword in the game. If you blow your chance do get it during a quest you should be SOL. Also, you can find the console command for it if you are too lazy to go to an earlier save an redo it.
2. I was able to do both Cerys an Hajlmar quests and I don't think you need to do a quest to get the place of power. It's on the mountain up, not in the basement I think.
3. You are way over powered, but scaling monsters is nonsensical, Monsters don't get stronger just because some guy with white hair does. If you want enemies to scale, there is mod for that though. A lot of people don't like the game to scale with you the entire way. A lot of people do. Try the mod. Honestly if you really want a challenge even in death march at that high of a level no monster near your level will be much of a challenge. It would have to be like 15 level higher than you at least. Also try the mod, RANDOM ENCOUNTERS. They have difficulty settings, The highest makes monsters randomly appear at high levels and more than one at a time.

First off, thanks for answering :)

1. Well, i do agree with you, but as i solved the riddle before entering i knew what i was looking for and went straight for a likely place, if you would have any reason to go wrong in the first place they should make that as an optional thing for the game.
2. No idea how you managed to do both quests in the end, and the quest is where you follow Cerys around for clues in the basement, you do get outside at the end where you find the place of power. And i did try to reach the mountain top from just bugging my way too it with the rolling, still couldn't get all the way there, and as an achievement-whore i HAVE to get that last "?" somehow. I mean looting the key to that door somewhere in the castle would be enough for me. And also, i downright REFUSE to cheat in games, and using a console is cheating in my opinion. Also, the console also lets you bypass all type of leveling and money problem or items, which, excuse my french, is bloody bullshit, no real gamer would do that.
3. To use it to spawn monsters is close enough to cheating for me despite it sounding like good fun, no thank you but no thank you.

1. I understand your frustration, I couldn't find the thing after like 5 tries before I had to look it up. Still I don't think It needs to be changed. The point is not to just give you the sword.

2. You are right about this. One, I didn't remember the exact time you are talking about and it is in the escape tunnel, but there has to be a way to get to it some how.

3. If you fell that way, than basically every gameplay mod is cheating. I see it as a game enhancement. Monsters spawn in the game normally, how is them spawning randomly that much different, especially if you beat ever other enemy?