As we look forward to the release of Wrath of the Lich King, I've been thinking on the new resource system they are introducing with the Death Knight. The runes carved into the Death Knight's blade are not necessarily unique amongst MMOs, but they are certainly new to WoW. I wonder though, as more hero classes are added to the game, will they use the new runic system? And how exactly would that work?
I can see many classes as defined by their weapons, the Blade Master and his sword, the Archmage and his staff, so it's not too far off to expect that when we have access to new hero classes they might use this system, but they might not. Adding new novel ways that we play the game we love is one of the reasons I do love WoW so much. I admit more than a little curiosity as to how this might play out. What sort of resource system do you see being used by, say, the Demon Hunter? Would they use mana, energy, rage, runes, or something completely different? Are there any advantages to the runic system over the others?