And how long is the card will be marked "collected"? For example, I've opened an epic I don't want so I dust it right away. But if I already collected other epics I would like to have them all again.
Forever. Once you've collected a card, you've collected it.
Is it possible to evolve a dormant minion?
Once it wakes up. ;)
So hoarding packs before major nerfs will be a good dust strat, if you have a good collection.
There's a caveat here: once you receive a card, you'll have it marked for "collected" purposes. So if you disenchant a card you've received, it's still considered "owned." So you can't exploit the refund system that way.
There's a great benefit to this though: If you don't like a particular card or class, you can disenchant them and not have to worry about getting them in future packs.
When was this? Was it hidden in the patch notes?
Uh, it might not *quite* be out. I think that change goes live when Ashes of Outland does.
So if you evolve into a new dormant minion will it start dormant
Yes. And you get the awaken trigger in two turns.
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