702.36d Any time you have priority, you may turn a face-down permanent you control face up. This is a special action; it doesn’t use the stack (see rule 115). To do this, show all players what the permanent’s morph cost would be if it were face up, pay that cost, then turn the permanent face up. (If the permanent wouldn’t have a morph cost if it were face up, it can’t be turned face up this way.) The morph effect on it ends, and it regains its normal characteristics. Any abilities relating to the permanent entering the battlefield don’t trigger when it’s turned face up and don’t have any effect, because the permanent has already entered the battlefield.
The Raptor will be in the graveyard before the Raiders is flipped up.
If the rules for Megamorph are exactly the same as those for Morph apart from the +1/+1 counter business (which they probably will be), then yes. Deathmist Raptor is in the graveyard as part of paying the cost before Gathan Raiders is officially turned face up, so it can trigger from the event.
Quote from Relevant part of CR 702.36d »
Any time you have priority, you may turn a face-down permanent you control face up. This is a special action; it doesn't use the stack (see rule 115). To do this, show all players what the permanent's morph cost would be if it were face up, pay that cost, then turn the permanent face up.
It should return to the battlefield. It is discarded as a cost, and costs must be paid before an effect can resolve.
It is a bit of a head-scratcher though, because unmorphing doesn't use the stack.
That's normally the case, but this rule works with effects that use the stack. Unmorphing doesn't use the stack, so I don't think it applies.
If the rules for Megamorph are exactly the same as those for Morph apart from the +1/+1 counter business (which they probably will be), then yes. Deathmist Raptor is in the graveyard as part of paying the cost before Gathan Raiders is officially turned face up, so it can trigger from the event.
I don't think that rule changes my interpretation, because morph doesn't use the stack. Yes, you pay the cost before it unmorphs, but Raptor's recursion does use the stack - it has to check if something is turned face up, but there isn't any time between paying the cost and unmorphing that the stack can come into play.
What allows Deathmist Raptor to be returned to the battlefield is its triggered ability's condition being satisfied, not necessarily that the ability is put onto the stack. From the quoted rules entry, the cost of discarding the Raptor will happen first. Immediately, the Raptor's ability will trigger. Then the Gathan Raiders is turned face up. SBA's are checked, and then the Raptor trigger will be put onto the stack and will resolve.
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[c]Lightning Bolt[/c] -> Lightning Bolt
[c=Lightning Bolt]Apple Pie[/c] -> Apple Pie
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...Raptor's recursion does use the stack - it has to check if something is turned face up, but there isn't any time between paying the cost and unmorphing that the stack can come into play.
I'm not really sure what you mean by "recursion". A triggered ability will trigger whenever the appropriate event happens, even though the trigger isn't actually put onto the stack until the next time a player gets priority. There's definitely time between paying the cost and turning a face down creature face up, because they're explicitly described as separate steps of the process in 702.36d. No player gets priority during that period of time, but that just means they can't take actions until after the creature is face up, and triggers won't go onto the stack until after it's face up.
It is a bit of a head-scratcher though, because unmorphing doesn't use the stack.
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The Raptor will be in the graveyard before the Raiders is flipped up.
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That's normally the case, but this rule works with effects that use the stack. Unmorphing doesn't use the stack, so I don't think it applies.
I don't think that rule changes my interpretation, because morph doesn't use the stack. Yes, you pay the cost before it unmorphs, but Raptor's recursion does use the stack - it has to check if something is turned face up, but there isn't any time between paying the cost and unmorphing that the stack can come into play.
[c]Lightning Bolt[/c] -> Lightning Bolt
[c=Lightning Bolt]Apple Pie[/c] -> Apple Pie
Vowels-Only Format
Minimum deck size: 60
Maximum number of identical cards: 4
Ban list: Cards whose English names begin with a consonant, Unglued and Unhinged cards, cards involving ante, Ancestral Recall
I'm Mike, from The Mana Pool.
Check out my Tapped Out profile and comment on my decks!