Arctophylax said:
To take a page from the TT, a Space Marine commander is allowed to wield 2 THs, and in fact, doesn't receive a bonus unless he does.
And really, this little piece of TT rules HAS to be the one that makes it directly into the RPG. The fact an SM commander is the only allowed two to duel wield. A picture in the codex, that could be normal power weapons seeing as they distinguish what power weapons look like.
Really, since DoW and more recent models, I've taken it as wrote that it's a two handed weapon these days.
In my fevoured brain I like to think that the concussive force of thunder hammer would break even a Space Marines fingers if it's not at least 3 foot from the head when it goes off.