I've been a gamer for over 40 years, so a question that often comes up in quiet moments of reflection is 'Do I really need more dice?'
And the answer is always 'Depends...are they pretty?'
Daggerheart's official dice set is indeed very pretty. I already have at least two D12s of different colours, but I didn't have -those- two D12s of different colours. And I love the marbling effect of the other polyhedrals, so yes, I bought them on a possibly unhealthy impulse.
"But Colin!" comes the cry, possibly from deep within my subconscious, "You have the limited edition Daggerheart boxset, which comes complete with a set of arguably the most beautiful dice you own! Why would you need another set of dice that do the exact same thing?"
And to that voice I say "Shut up, you don't know."
So when you're standing in your FLGS, gazing with awestruck wonder at the pretty shinies in the box with the Daggerheart logo, you too may hear a soft voice from deep within, warning you, nay, entreating you not to succumb to the lure of yet another system-bespoke dice set, tell that voice they're not the boss of you, and you'll buy all the dice you want to, damn it...especially if they're this beautiful.
By the way, the Duality Dice always roll doubles.*
*Warning: Duality Dice may not always roll doubles. You experience may vary...but the modifier will still be +2.