Patryn of Elvenshae
First Post
Nim said:Could you give a specific reference on that? It's counter to the way I'd always interpreted it.
No, unfortunately, I cannot. I don't recall the module in which it appeared.
As far as rules that disallow it, it's generally prohibited when you randomly generate items, and certain abilities have language such that they don't stack with each other, but that's the only place it appears.
SRD said:2 Reroll if you get a duplicate special ability, an ability incompatible with an ability that you’ve already rolled, or if the extra ability puts you over the +10 limit. A weapon’s enhancement bonus and special ability bonus equivalents can’t total more than +10.
...
Keen: ... This benefit doesn’t stack with any other effect that expands the threat range of a weapon (such as the keen edge spell or the Improved Critical feat).
Generally speaking, 2d6 fire tends to be less mechanically sound than 1d6 Fire + 1d6 Cold (etc.), because of the way Energy Resistance / Immunity tends to work.