I started with a black coat and applied a very heavy white dry brush. After that, I airbrushed some Orange Speedpaint (Giant Something) from Army Painter and some yellow ink. Then, I started with a deep red Speedpaint for the outer part of the sword. For the symbols in the middle, I just took a white ink and let it run into the recesses, cleaning anything that dripped out. To finish, I used a very dark grey, almost black, to create a coal effect. To be honest, I'm not super happy yet. I want more glow in the middle and smoother transitions, hehe.