1. At night I come without being fetched, at day I am gone without being stolen - Star Medallion

2. No beginning, no end. I am a symbol of the worlds cycles - Golden Circlet?

3. Two brothers we are, great burdens we bear, all day we are bitterly pressed - Worn out boots

4. Here, in this place, you swallow me. Yet, if I were more, I would swallow you - Jar of water

5. I have seen the mountains rise. I have seen the fall of Netheril. You shall die but still will I march on - Hourglass?

6. To those within the dungeon I am joy, to those fully beneath my gaze, I can be hell - Sun medallion?

7. I will save your life but yet can you die by me. I will settle disputes yet not with words - Sword Medallion

8. Name me and so shall you break me - No idea...

9. Always do I tell the truth, yet cannot speak. Look to me and see what really is - mirror

10. I have 2 heads but one body. The more I stand still the faster I run - No idea again...

11. Try and defeat me but try in vain. When I win I end your pain - no idea... Maybe smiling skull

Can anyone please try to fill in the gaps and/or correct what I've already wrote because it's getting really frustrating.

Thanks

2. Circlet
5. Sundial
6. Sun medallion
10. Hourglass
11. Skull

the item that is left goes on 8 :)

Thanks :)

I apparently haven't gotten to this point in the game yet, but the classic answer to 8 is "silence." Anything fit that MO?

Yep, the gagged man figurine...