[WHO] Implement Sarah Jane Smith

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

@@ -0,0 +1,38 @@
+package mage.abilities.keyword;
+
+import mage.abilities.MageSingleton;
+import mage.abilities.StaticAbility;
+import mage.constants.Zone;
+
+import java.io.ObjectStreamException;
+
+/**
+ * @author TheElk801
+ */
+public class DoctorsCompanionAbility extends StaticAbility implements MageSingleton {
+
+    private static final DoctorsCompanionAbility instance = new DoctorsCompanionAbility();
+
+    private Object readResolve() throws ObjectStreamException {
+        return instance;
+    }
+
+    public static DoctorsCompanionAbility getInstance() {
+        return instance;
+    }
+
+    private DoctorsCompanionAbility() {
+        super(Zone.BATTLEFIELD, null);
+    }
+
+    @Override
+    public String getRule() {
+        return "Doctor's companion <i>(You can have two commanders if the other is the Doctor.)</i>";
+    }
+
+    @Override
+    public DoctorsCompanionAbility copy() {
+        return instance;
+    }
+
+}

Mage/src/main/java/mage/constants/SubType.java

@@ -134,6 +134,7 @@ public enum SubType {
     DEMIGOD("Demigod", SubTypeSet.CreatureType),
     DEMON("Demon", SubTypeSet.CreatureType),
     DESERTER("Deserter", SubTypeSet.CreatureType),
+    DETECTIVE("Detective", SubTypeSet.CreatureType),
     DEVIL("Devil", SubTypeSet.CreatureType),
     DINOSAUR("Dinosaur", SubTypeSet.CreatureType), // With Ixalan now being spoiled, need this to be selectable
     DJINN("Djinn", SubTypeSet.CreatureType),