how to make this style/effect or you think it's an illustration 100%??

Well, the hands look like 3D generated although you can try applying Metallic Gradient Map to a hand image.
Added some lightning on the hands with Lightning Brush or PNG or Vector.
Background is a Lens flare, probably PNG or Vector.
'LIGHTNING' Text Helvetica with Light Purple to Dark Purple Gradient and Light Purple Outline. No idea about the 'BOLT' Font.

Hope this helped!