Implemented Serra the Benevolent

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

@@ -404,6 +404,7 @@ public enum SubType {
     SAHEELI("Saheeli", SubTypeSet.PlaneswalkerType),
     SAMUT("Samut", SubTypeSet.PlaneswalkerType),
     SARKHAN("Sarkhan", SubTypeSet.PlaneswalkerType),
+    SERRA("Serra", SubTypeSet.PlaneswalkerType),
     SIDIOUS("Sidious", SubTypeSet.PlaneswalkerType, true), // Star Wars
     SORIN("Sorin", SubTypeSet.PlaneswalkerType),
     TAMIYO("Tamiyo", SubTypeSet.PlaneswalkerType),

Mage/src/main/java/mage/game/command/emblems/SerraTheBenevolentEmblem.java

@@ -0,0 +1,73 @@
+package mage.game.command.emblems;
+
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.constants.Zone;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.game.command.Emblem;
+import mage.game.events.GameEvent;
+import mage.players.Player;
+
+/**
+ * @author TheElk801
+ */
+public final class SerraTheBenevolentEmblem extends Emblem {
+
+    // -6: You get an emblem with "If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead."
+    public SerraTheBenevolentEmblem() {
+        this.setName("Emblem Serra");
+        this.getAbilities().add(new SimpleStaticAbility(Zone.COMMAND, new SerraTheBenevolentEmblemEffect()));
+    }
+}
+
+class SerraTheBenevolentEmblemEffect extends ReplacementEffectImpl {
+
+    SerraTheBenevolentEmblemEffect() {
+        super(Duration.Custom, Outcome.Benefit);
+        staticText = "If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead";
+    }
+
+    private SerraTheBenevolentEmblemEffect(final SerraTheBenevolentEmblemEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public SerraTheBenevolentEmblemEffect copy() {
+        return new SerraTheBenevolentEmblemEffect(this);
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DAMAGE_CAUSES_LIFE_LOSS;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (source.isControlledBy(event.getPlayerId())) {
+            Player controller = game.getPlayer(source.getControllerId());
+            if (controller != null
+                    && (controller.getLife() - event.getAmount()) < 1
+                    && game.getBattlefield().count(
+                    StaticFilters.FILTER_CONTROLLED_CREATURE,
+                    source.getSourceId(), event.getPlayerId(), game) > 0
+            ) {
+                event.setAmount(controller.getLife() - 1);
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        return false;
+    }
+}