added miracle ability.

i choose to use other cost instead of creating a brand new cost type.

otherrestriction determines if the card is the miracle for the turn.

[card]
name=Devastation Tide
auto=all(*[-land]) moveto(ownerhand)
other={1}{u} name(Miracle)
otherrestriction=miracle
text=Return all nonland permanents to their owners' hands. -- Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)
mana={3}{U}{U}
type=Sorcery
[/card]

projects/mtg/src/MTGAbility.cpp

@@ -333,6 +333,14 @@ int AbilityFactory::parseCastRestrictions(MTGCardInstance * card, Player * playe
             if(!isMorbid)
                 return 0;
         }
+
+        check = restriction[i].find("miracle");
+        if(check != string::npos)
+        {
+            if(!card->miracle)
+                return 0;
+        }
+
         check = restriction[i].find("ownerscontrol");
         if(check != string::npos)
         {