I was told you can re-roll superior items and give non-superiors superior properties, like 15% ed.

Is it possible? If so how?

_________________
The body is but a vessel for the soul, a puppet which bends to the souls tyranny. And lo, the body is not eternal, for it must feed on the flesh of others, lest it return to the dust from whence it came. Therefore the soul deceive, despise and murder men.

Not quite what you are referring to, but for white items you can use the following recipes:

Low Quality Weapon/Armor + Mithril Hammer + Mithril Glyph = normal quality item

Normal Quality Weapon/Armor + Ada Hammer + Ada Glyph = superior quality item with random superior mod.

The second one is the more useful, but it isn't guaranteed to generate a 15% superior item, just some sort of superior item.

_________________
People who live in cinder block houses can throw whatever they want.

Ah I see. Thank-you.

_________________
The body is but a vessel for the soul, a puppet which bends to the souls tyranny. And lo, the body is not eternal, for it must feed on the flesh of others, lest it return to the dust from whence it came. Therefore the soul deceive, despise and murder men.