1.Joint are the same of force/relax
2.You need buy it on Shop/market
3.Well, in textures you can make this with higher size and can use custom image in the trail
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Oh well, about this you need the colors:
*Vampire ( Red )
*Void ( Black )
You will need a higher tc and qi to buy void, so i recommend you try got more qi and tc and buy Vampire and Hunter ( an black green,remember void )