RED update thoughts and feedback

I found a cubic chaos blade, could you teach me please, how do I craft cubes (what do I need and stuffs like that)

BTW, I found that vein at leafre, the map outside manon

Not much to it. You have to learn Smithing and get it to level 11 / 12.
For ingredients, you need Cube Frags, that most bosses drop, Superior Item Crystals, which you can get by extracting Necro Weapons, and some item you can buy from an NPC.
That's it, really.

I should mention you need at least 5 Cubic Chaos Blades to craft 1 cube.