Okay... I put some thought into this so it's... longer than most... maybe too long... :/ The short form is it's a sniper rifle, but crafted using enchantments to make the rifle fire and the scope see rather than using advanced electronics and gunpowder... Also, it can accept and fire pretty much any round that fits the 'firing' chamber, and then the enchantments in the chamber cause the 'affinity' of the bullet to become even stronger... so putting something that causes fire in there means the round fired becomes a 'fire affinity' round... which usually means it explodes in a fireball on impact, etc, etc. Also enchanted to be hidden from all but the most rigorous searches, both magical and mundane... because it's frankly an assassin's rifle, built to find a target that can't be put down any other way, and ensuring it's not getting up again... which means being able to sneak it around is a good thing.
[X] Ranged
-[X] A Sniper Rifle, created using some of the greatest enchantments possible, that can fire practically anything, provided it is the right shape, with the material making up the 'bullet' affecting the damage the round does upon impact. A bullet containing an acid? Will dissolve the surrounding area. An incendiary gel in a ceramic round? A fireball that sticks and burns even more than it would otherwise. A silver or cold iron bullet? Pray you aren't a magical entity vulnerable to silver or cold iron, because it will be an even more painful, though quicker death. All attacks also deal damage of both a 'physical' and 'magical' nature, combined. And due to the magic imbued in the weapon, it is almost soundless, with no muzzle flash, an integrated optical scope enchanted with the ability to scry anything within within line of sight of the rifle, with the angle from aimed from the muzzle, and it is hidden from all but the most detailed searches, mundane and magical. It is the weapon of an assassin, good or evil, holy or unholy, for order or chaos, it does not matter. Only that those who believe themselves safe, or immortal die once this weapon is taken up.
[X] Let's ponder some things.
[X] Emit an Aura, neither good nor evil, just one that suggests that any who wield this weapon must be willing to fight from the shadows those who others can't, and slay them. An aura of Endings, and lives taken. Of Shadows, and flashes in the dark.
If the weapon is too much, I just want a Sniper Rifle and scope, built in a high fantasy style, that can be hidden from those the wielder doesn't want to see it.
