Hello again and thanks guys for the replies!
the sword I found in the Lorvis chest is the "blood echelon sword".
I'm at level 22 and still uses it!
it does 21-35 melee damages; 6-11 magical damages, +2 conditionnal body, +3 to strengh.
And the enchantement (since it is written in orange (thanks to joram's info :))) is : normal damages increase by 65!
when I said 80 damage I meant overall, not the bonus

I actually had another sword before finding the new one with +60 damage (lol!)) but ..................ahem...i sold it and I don't remember where she is (maybe in the bandit camp....i might search here). It was "something sword of doom" I believe.
I patched the game before playing it so i have the lastest version (1.7.9 i believe?)!
are the set items generated or ar they in speceific places? I would love to find another blood echelon item.
I'm just after the battle tower, in the orobas fjord and the game is becoming awesome!
switching dragon form/normal form, flying among these cliffs, searching for hidden places, its a blast!
i'm a little overwhelmed by all the things that are feasable in the battle tower (alchemy, training, necromanacy..)though, but in a "good" way

I have a warrior, with sword+ shield, and bow for ranged attacks and I use : whirlwind, charge attack, ghots, firewall, and explosive arrow, and other stuffs. (i read somewhere it was a good combination).