I will probably pick up 14 or so stones, late in the week if 1.0.9 hasn’t dropped, and sit on them. I ground out the stones for my statue and soothsayer, so they are already set.
Since we don’t know what stones will be needed for the hero, I’m trying to bank a few. It takes too long to farm the Arcane Traitstones, so if you find you need a batch for a hero class, your stuck for a long time.
The worst case scenario is that Arcane Stones become more attainable and I’m out some glory.
We already know what 6 of the 7 probably are: blue, green, red, brown, purple yellow.
I’m in no rush to trait hero. There are probably only 2 out of the 7 that even have really good traits. All traits on hero, from what can currently be seen, do nothing for kingdoms. If hero counts as a 9th or 10th “troop”, than that would be a different story.
Nice one! =)
First ever Dragon for the Arena (soon anyways), and a pretty cool one, to boot! I’m pretty excited. 
I just realized that this is a different dragon from @Nimhain’s new avatar 
Hey, one Wyvern already spotted in the Arena. Time to shelf the Goblin Rocket net, where’s my dragon bait?
It took a while, but the Wyvern is now in the WIKI:
Wyvern | Gems of War Wikia | Fandom