[Blob] Depends on whether you include H, which is German for what we call B.

[rab] A likely story !

Anyway I haven't set one for a while - this one would probably spread over two answers if you know what I mean, as it is 19 letters long, and the max is usually 15 - but we don't have that constraint here.

They come in light, they punish harm - I embraced destruction ! (8,3,8)

[Blob] Rab is quite right, H *is* used in Germany (and some other European countries).

[Darren, rab] duhh ? So if H = B, what equals A (second time round ?) - or is it A,H,C,D,E,F,G ?

Germans use eight letters. The British "natural" notes A to G are represented as you so very rightly say above. B is reserved for B-flat. Apparantly it has something to do with a superstition revolving around the use of the letter B. However I suspect it is more likely due to the prevailing mode of the time. (And yes, I do mean mode).