[MID] Implemented Sungold Sentinel

Mage/src/main/java/mage/abilities/keyword/HexproofFromGreenAbility.java

@@ -0,0 +1,48 @@
+package mage.abilities.keyword;
+
+import mage.MageObject;
+import mage.game.Game;
+
+import java.io.ObjectStreamException;
+
+/**
+ * Hexproof from green (This creature or player can't be the target of green
+ * spells or abilities your opponents control.)
+ *
+ * @author igoudt
+ */
+public class HexproofFromGreenAbility extends HexproofBaseAbility {
+
+    private static final HexproofFromGreenAbility instance;
+
+    static {
+        instance = new HexproofFromGreenAbility();
+    }
+
+    private Object readResolve() throws ObjectStreamException {
+        return instance;
+    }
+
+    public static HexproofFromGreenAbility getInstance() {
+        return instance;
+    }
+
+    private HexproofFromGreenAbility() {
+        super();
+    }
+
+    @Override
+    public boolean checkObject(MageObject source, Game game) {
+        return source.getColor(game).isGreen();
+    }
+
+    @Override
+    public HexproofFromGreenAbility copy() {
+        return instance;
+    }
+
+    @Override
+    public String getRule() {
+        return "hexproof from green <i>(This creature can't be the target of green spells or abilities your opponents control.)</i>";
+    }
+}