Implemented Splicer's Skill

Mage.Sets/src/mage/cards/s/SplicersSkill.java

@@ -0,0 +1,35 @@
+package mage.cards.s;
+
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.keyword.SpliceOntoInstantOrSorceryAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.game.permanent.token.GolemToken;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class SplicersSkill extends CardImpl {
+
+    public SplicersSkill(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{2}{W}");
+
+        // Create a 3/3 colorless Golem artifact creature token.
+        this.getSpellAbility().addEffect(new CreateTokenEffect(new GolemToken()));
+
+        // Splice onto instant or sorcery {3}{W}
+        this.addAbility(new SpliceOntoInstantOrSorceryAbility("{3}{W}"));
+    }
+
+    private SplicersSkill(final SplicersSkill card) {
+        super(card);
+    }
+
+    @Override
+    public SplicersSkill copy() {
+        return new SplicersSkill(this);
+    }
+}

Mage.Sets/src/mage/sets/ModernHorizons.java

@@ -117,6 +117,7 @@ public final class ModernHorizons extends ExpansionSet {
         cards.add(new SetCardInfo("Snow-Covered Mountain", 253, Rarity.LAND, mage.cards.s.SnowCoveredMountain.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Snow-Covered Plains", 250, Rarity.LAND, mage.cards.s.SnowCoveredPlains.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Snow-Covered Swamp", 252, Rarity.LAND, mage.cards.s.SnowCoveredSwamp.class, FULL_ART_BFZ_VARIOUS));
+        cards.add(new SetCardInfo("Splicer's Skill", 31, Rarity.UNCOMMON, mage.cards.s.SplicersSkill.class));
         cards.add(new SetCardInfo("Spore Frog", 180, Rarity.COMMON, mage.cards.s.SporeFrog.class));
         cards.add(new SetCardInfo("Springbloom Druid", 181, Rarity.COMMON, mage.cards.s.SpringbloomDruid.class));
         cards.add(new SetCardInfo("Squirrel Nest", 182, Rarity.UNCOMMON, mage.cards.s.SquirrelNest.class));

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

@@ -0,0 +1,182 @@
+package mage.abilities.keyword;
+
+import mage.MageObject;
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.Costs;
+import mage.abilities.costs.CostsImpl;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.SpliceCardEffectImpl;
+import mage.cards.Card;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.constants.SpellAbilityType;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.stack.Spell;
+import mage.players.Player;
+
+import java.util.Iterator;
+
+/**
+ * 702.45. Splice
+ * <p>
+ * 702.45a Splice is a static ability that functions while a card is in your
+ * hand. "Splice onto [subtype] [cost]" means "You may reveal this card from
+ * your hand as you cast a [subtype] spell. If you do, copy this card's text box
+ * onto that spell and pay [cost] as an additional cost to cast that spell."
+ * Paying a card's splice cost follows the rules for paying additional costs in
+ * rules 601.2b and 601.2e-g.
+ * <p>
+ * Example: Since the card with splice remains in the player's hand, it can
+ * later be cast normally or spliced onto another spell. It can even be
+ * discarded to pay a "discard a card" cost of the spell it's spliced onto.
+ * <p>
+ * 702.45b You can't choose to use a splice ability if you can't make the
+ * required choices (targets, etc.) for that card's instructions. You can't
+ * splice any one card onto the same spell more than once. If you're splicing
+ * more than one card onto a spell, reveal them all at once and choose the order
+ * in which their instructions will be followed. The instructions on the main
+ * spell have to be followed first.
+ * <p>
+ * 702.45c The spell has the characteristics of the main spell, plus the text
+ * boxes of each of the spliced cards. The spell doesn't gain any other
+ * characteristics (name, mana cost, color, supertypes, card types, subtypes,
+ * etc.) of the spliced cards. Text copied onto the spell that refers to a card
+ * by name refers to the spell on the stack, not the card from which the text
+ * was copied.
+ * <p>
+ * Example: Glacial Ray is a red card with splice onto Arcane that reads,
+ * "Glacial Ray deals 2 damage to any target." Suppose Glacial Ray is spliced
+ * onto Reach Through Mists, a blue spell. The spell is still blue, and Reach
+ * Through Mists deals the damage. This means that the ability can target a
+ * creature with protection from red and deal 2 damage to that creature.
+ * <p>
+ * 702.45d Choose targets for the added text normally (see rule 601.2c). Note
+ * that a spell with one or more targets will be countered if all of its targets
+ * are illegal on resolution.
+ * <p>
+ * 702.45e The spell loses any splice changes once it leaves the stack (for
+ * example, when it's countered, it's exiled, or it resolves).
+ * <p>
+ * Rulings
+ * <p>
+ * You must reveal all of the cards you intend to splice at the same time. Each
+ * individual card can only be spliced once onto a spell. If you have more than
+ * one card with the same name in your hand, you may splice both of them onto
+ * the spell. A card with a splice ability can't be spliced onto itself because
+ * the spell is on the stack (and not in your hand) when you reveal the cards
+ * you want to splice onto it. The target for a card that's spliced onto a spell
+ * may be the same as the target chosen for the original spell or for another
+ * spliced-on card. (A recent change to the targeting rules allows this, but
+ * most other cards are unaffected by the change.) If you splice a targeted card
+ * onto an untargeted spell, the entire spell will be countered if the target
+ * isn't legal when the spell resolves. If you splice an untargeted card onto a
+ * targeted spell, the entire spell will be countered if the target isn't legal
+ * when the spell resolves. A spell is countered on resolution only if *all* of
+ * its targets are illegal (or the spell is countered by an effect).
+ *
+ * @author LevelX2
+ */
+public class SpliceOntoInstantOrSorceryAbility extends SimpleStaticAbility {
+
+    private static final String KEYWORD_TEXT = "Splice onto instant or sorcery";
+    private Costs<Cost> spliceCosts = new CostsImpl<>();
+    private boolean nonManaCosts = false;
+
+    public SpliceOntoInstantOrSorceryAbility(String manaString) {
+        super(Zone.HAND, new SpliceOntoInstantOrSorceryEffect());
+        spliceCosts.add(new ManaCostsImpl<>(manaString));
+    }
+
+    public SpliceOntoInstantOrSorceryAbility(Cost cost) {
+        super(Zone.HAND, new SpliceOntoInstantOrSorceryEffect());
+        spliceCosts.add(cost);
+        nonManaCosts = true;
+    }
+
+    private SpliceOntoInstantOrSorceryAbility(final SpliceOntoInstantOrSorceryAbility ability) {
+        super(ability);
+        this.spliceCosts = ability.spliceCosts.copy();
+        this.nonManaCosts = ability.nonManaCosts;
+    }
+
+    @Override
+    public SimpleStaticAbility copy() {
+        return new SpliceOntoInstantOrSorceryAbility(this);
+    }
+
+    Costs getSpliceCosts() {
+        return spliceCosts;
+    }
+
+    @Override
+    public String getRule() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(KEYWORD_TEXT).append(nonManaCosts ? "&mdash;" : " ");
+        sb.append(spliceCosts.getText()).append(nonManaCosts ? ". " : " ");
+        sb.append("<i>(As you cast an instant or sorcery spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)</i>");
+        return sb.toString();
+    }
+}
+
+class SpliceOntoInstantOrSorceryEffect extends SpliceCardEffectImpl {
+
+    SpliceOntoInstantOrSorceryEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Copy);
+        staticText = "Splice onto Instant or Sorcery";
+    }
+
+    private SpliceOntoInstantOrSorceryEffect(final SpliceOntoInstantOrSorceryEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public SpliceOntoInstantOrSorceryEffect copy() {
+        return new SpliceOntoInstantOrSorceryEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source, Ability abilityToModify) {
+        Player controller = game.getPlayer(source.getControllerId());
+        Card spliceCard = game.getCard(source.getSourceId());
+        if (spliceCard != null && controller != null) {
+            Spell spell = game.getStack().getSpell(abilityToModify.getId());
+            if (spell != null) {
+                SpellAbility splicedAbility = spliceCard.getSpellAbility().copy();
+                splicedAbility.setSpellAbilityType(SpellAbilityType.SPLICE);
+                splicedAbility.setSourceId(abilityToModify.getSourceId());
+                spell.addSpellAbility(splicedAbility);
+                for (Iterator it = ((SpliceOntoInstantOrSorceryAbility) source).getSpliceCosts().iterator(); it.hasNext(); ) {
+                    spell.getSpellAbility().getCosts().add(((Cost) it.next()).copy());
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public boolean applies(Ability abilityToModify, Ability source, Game game) {
+        MageObject object = game.getObject(abilityToModify.getSourceId());
+        if (object != null && object.isInstantOrSorcery()) {
+            return spliceSpellCanBeActivated(source, game);
+        }
+        return false;
+    }
+
+    private boolean spliceSpellCanBeActivated(Ability source, Game game) {
+        // check if spell can be activated (protection problem not solved because effect will be used from the base spell?)
+        Card card = game.getCard(source.getSourceId());
+        if (card != null) {
+            if (card.getManaCost().isEmpty()) { // e.g. Evermind
+                return card.getSpellAbility().spellCanBeActivatedRegularlyNow(source.getControllerId(), game);
+            } else {
+                return card.getSpellAbility().canActivate(source.getControllerId(), game).canActivate();
+            }
+        }
+        return false;
+    }
+}