Need help and advice on Grind Attribute???

[diamondx]

I have a 10* Divine Staff Amaterasu grinded at 10 already with the following on it: tech 3, ragne soul, stamina 2 and stamina boost. the element is 36 percent light. My question is what is the following materials required to change my weapon from light to a dark weapon. Also i want to know if i do the conversion will i lose any of my enhancements that is on my weapon?
Where exactly can i find this Attribute Change (Dark); i looked in ac scratch but where ???
I am a priemre player too , hope that helps :)

[WildarmsRE5]

._. why would you want your Amaterasu to be dark?

it's supposed to be light because it has Light Technic Latent on it.

get the 11* rod instead if you want to have an Il Megid Rod.

[Sandmind]

What WildarmsRE5 meant to say was that FO is soon getting a main-class only 5 point skill that give up to 25% of your element as % damange (aka up to 25% with 50 element). As such, it would make more sense to keep the attribute light to further boost your light technic with it.