[DFT] Add Guidelight Matrix artifact

add static method from SaddleAbility to saddle a permanent
add common saddle effect
refactor Alacrian Armory with new saddle effect

Mage/src/main/java/mage/abilities/effects/common/SaddleTargetMountEffect.java

@@ -0,0 +1,44 @@
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.keyword.SaddleAbility;
+import mage.constants.Outcome;
+import mage.constants.SubType;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+
+/**
+ * @author Jmlundeen
+ */
+public class SaddleTargetMountEffect extends OneShotEffect {
+
+    public SaddleTargetMountEffect() {
+        super(Outcome.Benefit);
+        staticText = "Target Mount you control becomes saddled until end of turn";
+    }
+
+    public SaddleTargetMountEffect(String rule) {
+        super(Outcome.Benefit);
+        staticText = rule;
+    }
+
+    protected SaddleTargetMountEffect(final SaddleTargetMountEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public SaddleTargetMountEffect copy() {
+        return new SaddleTargetMountEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent targetMount = game.getPermanent(getTargetPointer().getFirst(game, source));
+        if (targetMount == null || !targetMount.hasSubtype(SubType.MOUNT, game)) {
+            return false;
+        }
+        return SaddleAbility.applySaddle(targetMount, game);
+    }
+
+}

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

@@ -48,6 +48,23 @@ public class SaddleAbility extends SimpleActivatedAbility {
         this.value = ability.value;
     }
 
+    public static boolean applySaddle(Permanent permanent, Game game) {
+        if (permanent == null) {
+            return false;
+        }
+        SaddleAbility saddleAbility = permanent.getAbilities().stream()
+                .filter(a -> a instanceof SaddleAbility)
+                .map(a -> (SaddleAbility) a)
+                .findFirst()
+                .orElse(null);
+        if (saddleAbility != null) {
+            SaddleEventEffect effect = new SaddleEventEffect();
+            effect.apply(game, saddleAbility);
+            return true;
+        }
+        return false;
+    }
+
     @Override
     public SaddleAbility copy() {
         return new SaddleAbility(this);