They are indeed ladder only. And while the existing ones should move over to non-ladder after season 2, I wouldn't expect new ones to ever drop in non-ladder, considering that they changed their mind on enabling S1 runewords as well.
I'm guessing, as a singleplayer now, that they conserve the hype of terrorzones and sunder charms for the ladder season, otherwise they'll lose players to the single player. next season it'll be probably something else...much like d3 introduces "refreshing ideas"...
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BestUsernameEver
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