I don’t know how to phrase this question in generalities, so I’m going to present this as a specific scenario and hope you can tell me how to extrapolate the general rule.
Absolute Zero is among a group of heroes fighting Gran Warlord Voss in the Ruins of Atlantis. Voss has Forced Deployment in play; the environment deck has two Phosphorescent Chambers in play.* Absolute Zero wants to play Fueled Freeze, which will destroy the Forced Deployment and bring ten or twelve minions into play.
My question is, does the destruction of Forced Deployment trigger the release of all those scrapped minions before Fueled Freeze finishes its second effect of inflicting (number of destroyed cards) damage on all non-heroes, or does the entire Fueled Freeze card resolve itself before the destruction of Forced Deployment comes into play?
I’m sure this question has been asked in the past, but I can’t figure out the terminology to find an answer in a search, so thank you for humoring me.
*Since two of the other heroes are the Scholar and the Argent Adept, I am getting a great deal of enjoyment out of those +2 to HP recovery.
Once Forced Deployment is destroyed, it triggers it's text before completing Fueled Freeze, so the minions will be in play. The same thing happens when Visionary damages and destroys a target with Wrest the Mind after redirecting. Target takes damage and is destroyed, triggering Wrest the Mind's destruction before Visionary deals herself damage.
Forced Deployment puts all the minions into play..
Fueled Freeze damages them all. Most probably die.
You cackle maniacally.
In general if a card triggers another card you stop processing the first card at that point and resolve the second. Once that's done you go back to the first card and finish resolving it (then move to the trash if it's a one-shot). It's possible to nest a whole series of cards.
Similarly a one-shot doesn't go into the trash until it's completely resolved, so if you've played Fleet of Foot for example, it remains in play until the card that you played as a result of it has resolved itself.
This is especially relevant for cards like Omnitron-X's Reset which shuffle the trash back into the deck. The card causing the shuffle is not, itself, in the trash yet!
Thanks very much, everyone. This question has been coming up a lot lately (with much more complicated and convoluted examples mostly involving Akash’Bhuta), so I appreciate having and answer…and yes, with the +2 to damage killing off every minion except the Frost-Bound one as soon as it came into play, I was in fact quite pleased with how it turned out. Smug, even.
Akash'Bhuta…that'll be Primeval Eruption then, would it? Yeah, you can get many cards out as a result from that one. I don't know how many times I've had Primeval Eruption play another Primeval Eruption, and sometimes a third Primeval Eruption…
Primeval Eruption put into play by another Primeval Eruption put into play by Disrupt the Field while Askash’Bhuta is flipped and nnnaagh me brain just fell out come back little guy glurgle wurgle splortz
I like to say that it works like a function call in programming. Some people don't know what that means, but if you do its a great way to thing about it.
The other related ruling (which hasn't been explicitly stated in this thread yet) is that nothing happens simultaneously, even things like "deal 3 damage to each non-hero target" or "destroy all cards in play other than this card, character cards, and relic cards". Even though lines like that seem like one action, it's really several mini-actions. This means that you can do tricky things like killing the minion that provides damage reduction before the other minions get a chance to use the damage reduction, or possibly most famously, use End of Days to kill all the villian cards and the environment cards you want killed, then kill Unity's Bee Bot, which kills EoD in response, ending the destruction before any other hero cards are destroyed.
Yeah, you can get 
