Mhm

i have heard there is an artefact that if u kill your helpers the blade evolves and gets stronger or something like that.

Ebony blade, if you kill people who like you the enchantment gets stronger, starts at i believe 10 points of absorb hp, then can eventually go up to 30 by. Goes up by 5 points for every 2 people who like you that you kill.

I just complete 100% of the last Elder scrolls and i would like to get an idea of the gameplay Like are the graphics still medevil style or better and is the story line a little bit clearer? thanks for your help in advence!!

Of course. ^.^ I have already 100% beaten the main storyline and the side guild storylines, and i say that the gameplay and graphics are relatively the same as Oblivon, and by the same i mean the layout not the quality. In the beginning it gives you more info on why you are a prisoner but im not gonna spoil it for you lol. The storyline itself is relatively similar to Oblivon but better laid out IMO. The old graphics engine was completely dumped, so the new graphics engine the "Creation Engine" is 100% better, if you have HD cables and a good TV, i suggest using them.

Anything i did not cover with that?

Bumping this ^.^