can't be cast while silenced, but can while disarmed
ignores any sort of dodge, parry, or block mechanics
cannot be spell reflected, but is countered by anything affecting spell damage
procs the frost armor debuff
The last one is a real kicker. Judgement via Long Arm of the Law is ret's answer to mobility. If Judgement can't be considered the same kind of attack as Hammer of Wrath (does all of the above except doesn't proc frost armor), could Judgement just be considered a spell and be done with it? I'd gladly trade Judgement getting reflected if it means I'm not insta snaring myself whenever I judge a mage with frost armor up. It won't give ret much of a foothold against mages and we'd still be fodder for them, but at least it would take out a little of the insult with injury.