kinda like your current name a lot, it as an unique and a friendly feel to it but xShadows and xBlade are also striking I am agreeing with @legendaryfox977 Something like xShadowxBlade could work rlly nice and it gives you a it of an intimidating touch so in the end, it kind of depends on how you want to represent yourself and how you feel on the inside:)
I agree with Neurogenesis, but I will be absolutely shocked if a 6 character username like xBlade is actually not taken
5 months ago I found a 4 character username so the next day I made an alt acount to have that name but some one already took it