Hearthpwn

Yeah. Krog would read "Battlecry: destroy your hero and replace him with the lich king. You would still get the weapon.

4) I see your point.

6)  Why wouldn't it work? Jarraxus' ability is "Battlecry: destroy your and replace him with Lord Jaraxxus."  Your hero power is replaced, you get a weapon, and your health is set to 15. Couldn't Krog be the same,  just made to keep Krog?

Ice Shards should cost 2, as Arcane Missiles costs 1 for the same effect minus the freeze.

I think Dark Command is worded incorrectly.

Frost strike should cost 3, as Cleave costs two for the same effect minus the freeze.

I think shatter should cost zero.

I don't think hearthstone differentiates between tokens. (about shadowmourne)

There is no need for Frostmourne to have the battlecry. Krog can act like Jarraxus, but you still get the minion.