Forge will no longer crash when there are decks with unsupported cards. These cards will appear in decks and games player starts as a dummy without cost, types, abilities, but with explanation in card's text

forge-core/src/main/java/forge/card/CardRules.java

@@ -490,4 +490,17 @@ public final class CardRules implements ICardCharacteristics {
             } // unsuported
         }
     }
+
+    public static CardRules getUnsupportedCardNamed(String name) {
+        CardAiHints cah = new CardAiHints(true, true, null, null);
+        CardFace[] faces = { new CardFace(name), null};
+        faces[0].setColor(ColorSet.fromMask(0));
+        faces[0].setType(CardType.parse(""));
+        faces[0].setOracleText("This card is not supported by Forge. Whenever you start a game with this card, it will be bugged.");
+        faces[0].setNonAbilityText("This card is not supported by Forge.\nWhenever you start a game with this card, it will be bugged.");
+        faces[0].assignMissingFields();
+        final CardRules result = new CardRules(faces, CardSplitType.None, cah);
+
+        return result;
+    }
 }

forge-core/src/main/java/forge/deck/CardPool.java

@@ -64,14 +64,16 @@ public class CardPool extends ItemPool<PaperCard> {
             cp = StaticData.instance().getVariantCards().getCard(cardName, setCode);
         }
 
-        if (cp == null )
-            throw new RuntimeException(String.format("Card %s from %s is not supported by Forge, as it's neither a known common card nor one of casual variants' card.", cardName, setCode ));
-
-        boolean artIndexExplicitlySet = artIndex > 0 || Character.isDigit(cardName.charAt(cardName.length()-1)) && cardName.charAt(cardName.length()-2) == CardDb.NameSetSeparator; 
-        setCode = cp.getEdition();
-        cardName = cp.getName();
-         
-        int artCount = isCommonCard ? StaticData.instance().getCommonCards().getArtCount(cardName, setCode) : 1;
+        boolean artIndexExplicitlySet = artIndex > 0 || Character.isDigit(cardName.charAt(cardName.length()-1)) && cardName.charAt(cardName.length()-2) == CardDb.NameSetSeparator;
+        int artCount = 1;
+        
+        if (cp != null ) {
+            setCode = cp.getEdition();
+            cardName = cp.getName();
+            artCount = isCommonCard ? StaticData.instance().getCommonCards().getArtCount(cardName, setCode) : 1;
+        }
+        else
+            cp = PaperCard.createUnsuportedCard(cardName); 
 
         if (artIndexExplicitlySet || artCount <= 1) {
             // either a specific art index is specified, or there is only one art, so just add the card

forge-core/src/main/java/forge/deck/Deck.java

@@ -249,6 +249,8 @@ public class Deck extends DeckBase implements Iterable<Entry<DeckSection, CardPo
                     if( c == null)
                         c = StaticData.instance().getCommonCards().getCardFromEdition(cardName, dayAfterNewestSetRelease, SetPreference.Latest, -1);
                     // this is to randomize art of all those cards
+                    if( c == null ) // I give up!
+                        c = cp.getKey();
                     newPool.add(cardName, c.getEdition(), cp.getValue());
                 } else
                     newPool.add(c, cp.getValue());

forge-core/src/main/java/forge/item/PaperCard.java

@@ -19,6 +19,7 @@ package forge.item;
 
 import com.google.common.base.Function;
 
+import forge.card.CardEdition;
 import forge.card.CardRarity;
 import forge.card.CardRules;
 
@@ -190,4 +191,8 @@ public final class PaperCard implements Comparable<IPaperCard>, InventoryItemFro
         
         return Integer.compare(artIndex, o.getArtIndex());
     }
+
+    public static PaperCard createUnsuportedCard(String cardName) {
+        return new PaperCard(CardRules.getUnsupportedCardNamed(cardName), CardEdition.UNKNOWN.getCode(), CardRarity.Unknown, 1);
+    }
 }

forge-gui/src/main/java/forge/ImageCache.java

@@ -144,6 +144,9 @@ public class ImageCache {
         if (imageKey.startsWith(ImageKeys.CARD_PREFIX))
             imageKey = getImageKey(getPaperCardFromImageKey(imageKey.substring(2)), altState, true);
 
+        if (StringUtils.isBlank(imageKey)) { 
+            return null;
+        }
         
         // Load from file and add to cache if not found in cache initially. 
         BufferedImage original = getImage(imageKey);
@@ -153,7 +156,7 @@ public class ImageCache {
         if (original == null) {
             if (useDefaultIfNotFound) { 
                 original = _defaultImage;
-                _CACHE.put(imageKey, _defaultImage);                
+                _CACHE.put(imageKey, _defaultImage);
             } else {
                 original = null;
             }            
@@ -243,7 +246,7 @@ public class ImageCache {
 
     
     private static String getImageRelativePath(PaperCard cp, boolean backFace, boolean includeSet, boolean isDownloadUrl) {
-        final String nameToUse = getNameToUse(cp, backFace);
+        final String nameToUse = cp == null ? null : getNameToUse(cp, backFace);
         if ( null == nameToUse )
             return null;