They all have it. Just some have it to different degrees than others. DN has the twirly glowies around your arms when you raise them up to activate it, and although I've never taken Soul Tentacles I'd imagine there is a fair ammount of it on that, too.
they are white like GWs 
-- soul tents that is
Issue 24 PPM Calculator // The Great Makeover: The Vindicators
...of all the powers in Soul Mastery, which have the twirlly glow effect added to it?
Just Gloom and Soul Storm? Or does Darkest Night and Soul Tentacles have it as well?
BrandX Future Staff Fighter
The BrandX Collection