1) I'm still on the fence on that one. Yes, the tooltip says 1-2, but the tooltips are frequently wrong in the game, as you well know
. Plus, there's no indication of what the chance of a second one should be, if in fact you are supposed to get 1-2. Should it be a 50-50 split?
2) Icy Rage is the skill that increases your critical hit chance for Rage, but it should be pointed out that you
always should have a chance to crit with Spells/Rage attacks. The probability seems quite low (unless they have Doom cast on them, which guaruntees a crit with anything). If I'm reading this right, the base probability is:
3 x (current mana-or-rage / maximum mana-or-rage).
3) It's not really a bug, it's just a side-effect of fixing the critical hit bug. It required one of my units to take a critical hit to activate, which never happened (because of the bug). Now that it's fixed, it does happen, which took me by surprise.
4) I've read about it, but I haven't got that spell yet, so I haven't tried using in on various undead. Maybe I'll cheat and give it to myself to see what's up.