add MayPlaySnowIgnoreColor for Draugr Necromancer

forge-game/src/main/java/forge/game/card/CardPlayOption.java

@@ -59,6 +59,10 @@ public final class CardPlayOption {
         return sta.hasParam("MayPlayIgnoreType");
     }
 
+    public boolean isIgnoreSnowSourceManaCostColor() {
+        return sta.hasParam("MayPlaySnowIgnoreColor");
+    }
+
     public boolean isWithFlash() {
     	return withFlash;
     }

forge-game/src/main/java/forge/game/mana/ManaConversionMatrix.java

@@ -7,8 +7,28 @@ public class ManaConversionMatrix {
 
     // Conversion matrix ORs byte values to make mana more payable
     // Restrictive matrix ANDs byte values to make mana less payable
-    byte[] colorConversionMatrix = new byte[ManaAtom.MANATYPES.length];
+    protected byte[] colorConversionMatrix = new byte[ManaAtom.MANATYPES.length];
-    byte[] colorRestrictionMatrix = new byte[ManaAtom.MANATYPES.length];
+    protected byte[] colorRestrictionMatrix = new byte[ManaAtom.MANATYPES.length];
+
+    protected boolean snowForColor = false;
+
+    public boolean isSnowForColor() {
+        return snowForColor;
+    }
+
+    public void setSnowForColor(boolean value) {
+        snowForColor = value;
+    }
+
+    public byte getPossibleColorUses(byte color) {
+        // Take the current conversion value, AND with restrictions to get mana usage
+        int rowIdx = ManaAtom.getIndexOfFirstManaType(color);
+        int matrixIdx = rowIdx < 0 ? identityMatrix.length - 1 : rowIdx;
+
+        byte colorUse = colorConversionMatrix[matrixIdx];
+        colorUse &= colorRestrictionMatrix[matrixIdx];
+        return colorUse;
+    }
 
     public void adjustColorReplacement(byte originalColor, byte replacementColor, boolean additive) {
         // Fix the index without hardcodes
@@ -30,6 +50,7 @@ public class ManaConversionMatrix {
         for (int i = 0; i < colorRestrictionMatrix.length; i++) {
             colorRestrictionMatrix[i] &= extraMatrix.colorRestrictionMatrix[i];
         }
+        setSnowForColor(extraMatrix.isSnowForColor());
     }
 
     public void restoreColorReplacements() {
@@ -41,5 +62,6 @@ public class ManaConversionMatrix {
         for (int i = 0; i < colorRestrictionMatrix.length; i++) {
             colorRestrictionMatrix[i] = ManaAtom.ALL_MANA_TYPES;
         }
+        snowForColor = false;
     }
 }

forge-game/src/main/java/forge/game/mana/ManaCostBeingPaid.java

@@ -547,6 +547,11 @@ public class ManaCostBeingPaid {
         	return false;
         }
 
+        // snow can be paid for any color
+        if (shard.getColorMask() != 0 && mana.isSnow() && pool.isSnowForColor()) {
+            return true;
+        }
+
         byte color = mana.getColor();
         return pool.canPayForShardWithColor(shard, color);
     }

forge-game/src/main/java/forge/game/mana/ManaPool.java

@@ -298,16 +298,6 @@ public class ManaPool extends ManaConversionMatrix implements Iterable<Mana> {
         p.getGame().fireEvent(new GameEventZone(ZoneType.Battlefield, p, EventValueChangeType.ComplexUpdate, null));
     }
 
-    public byte getPossibleColorUses(byte color) {
-        // Take the current conversion value, AND with restrictions to get mana usage
-        int rowIdx = ManaAtom.getIndexOfFirstManaType(color);
-        int matrixIdx = rowIdx < 0 ? identityMatrix.length - 1 : rowIdx;
-
-        byte colorUse = colorConversionMatrix[matrixIdx];
-        colorUse &= colorRestrictionMatrix[matrixIdx];
-        return colorUse;
-    }
-
     public boolean canPayForShardWithColor(ManaCostShard shard, byte color) {
         if (shard.isOfKind(ManaAtom.COLORLESS) && color == ManaAtom.GENERIC) {
             return false; // FIXME: testing Colorless against Generic is a recipe for disaster, but probably there should be a better fix.

forge-gui/res/cardsfolder/upcoming/draugr_necromancer.txt

@@ -0,0 +1,11 @@
+Name:Draugr Necromancer
+ManaCost:3 B
+Types:Snow Creature Zombie Cleric
+PT:4/4
+R:Event$ Moved | ActiveZones$ Battlefield | Origin$ Battlefield | Destination$ Graveyard | ValidLKI$ Creature.nonToken+OppCtrl | ReplaceWith$ Exile | CheckSelfLKIZone$ True | Description$ If a nontoken creature an opponent controls would die, exile that card with an ice counter on it instead.
+SVar:Exile:DB$ ChangeZone | Origin$ Battlefield | Destination$ Exile | Defined$ ReplacedCard | SubAbility$ DBPutCounter
+SVar:DBPutCounter:DB$ PutCounter | Defined$ ReplacedCard | CounterType$ ICE | CounterNum$ 1
+S:Mode$ Continuous | Affected$ Card.OppOwn+counters_GE1_ICE+nonLand | AffectedZone$ Exile | MayPlay$ True | MayPlaySnowIgnoreColor$ True | Description$ You may cast spells from among cards in exile your opponents own with ice counters on them, and you may spend mana from snow sources as though it were mana of any color to cast those spells.
+DeckNeeds:Type$Snow
+DeckHas:Ability$Counters
+Oracle:If a nontoken creature an opponent controls would die, exile that card with an ice counter on it instead.\nYou may cast spells from among cards in exile your opponents own with ice counters on them, and you may spend mana from snow sources as though it were mana of any color to cast those spells.

forge-gui/src/main/java/forge/player/HumanPlaySpellAbility.java

@@ -119,6 +119,10 @@ public class HumanPlaySpellAbility {
             human.incNumManaConversion();
         }
 
+        if (option != null && option.isIgnoreSnowSourceManaCostColor()) {
+            payment.setSnowForColor(true);
+        }
+
         if (ability.isAbility() && ability.isActivatedAbility()) {
             final Map<String, String> params = Maps.newHashMap();
             params.put("ManaColorConversion", "Additive");