Guild Wars 2

I’ve been playing for a while now and I got couple achievements and items during dragon bash when the fireworks even occured i got Light Horns of the Dragon Skin
is this item a skin or one use item? and during dragon bash i played 20 games of dragon ball however this achievement did not count to dragon bash experience, why? One last thing I use dagger/scepter condition necromancer build does the offhand weapon affect overall damage example i replace my magic quality low damage dagger with masterwork or higher quality dagger does this increase my damage or is it only dependent on scepter? I havent found anything in wiki so i come here.

Dragon Helmet skin(s) can be applied to any helmet once. After that to keep the look, but get better stats you need to use Transmutation Stones (up to lvl 79) or Transmutation Crystals (lvl 80).

There was an announcement on the dragonball not counting, I am not quite sure why, but it was not a bug that it did not count.

And yes, the quality of your off hand weapon will affect your damage.

Oh, good to know thank you everyone I got my Holographic Shattered Dragon Wing Cover on at very last moment if I use is it added to item permanently and it cant be removed once used if that is the case I think I save my wings until I get a good back item.

You can use it, then transmute it when you get a better back item. You just need a transmutation stone or transmutation crystal (crystal if one of the items is level 80, stone if neither are). Trans crystals are kind of hard to come by without spending gems, so if you think you can wait a bit to use the skin then why not? But you can certainly use it now and worry about transferring later too, totally up to you.