add '<n> or fewer cards in hand' condition

src/magic/model/condition/MagicConditionFactory.java

@@ -109,6 +109,15 @@ public class MagicConditionFactory {
         };
     }
 
+    public static MagicCondition HandAtMost(final int n) {
+        return new MagicCondition() {
+            @Override
+            public boolean accept(MagicSource source) {
+                return source.getController().getHandSize() <= n;
+            }
+        };
+    }
+
     public static MagicCondition RNHandAtLeast(final int n) {
         return new MagicCondition() {
             @Override

src/magic/model/condition/MagicConditionParser.java

@@ -132,6 +132,12 @@ public enum MagicConditionParser {
             return MagicConditionFactory.HandAtLeast(amount);
         }
     },
+    HandFewer("you have " + ARG.AMOUNT +" or fewer cards in hand") {
+        public MagicCondition toCondition(final Matcher arg) {
+            final int amount = ARG.amount(arg);
+            return MagicConditionFactory.HandAtMost(amount);
+        }
+    },
     Hellbent("(you )?have no cards in hand") {
         public MagicCondition toCondition(final Matcher arg) {
             return MagicCondition.HELLBENT;