I believe Shadow and Flame (5% Spell Crit debuff) is available to all three specs of Warlock. However, RaidComp seems to think that Destruction can't use it.
(apologies if I'm posting in the wrong forum, didn't find a bug reporting forum)
It used to be keyed to Shadowbolt only, and was a distraction for Destro to maintain. It now procs from Incinerate as well, and all three specs do provide the buff continuously.