LeylineOfSingularity.java example

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mage-master
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package mage.cards.l;

import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.Mode;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.ContinuousEffectImpl;
import mage.abilities.keyword.LeylineAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.*;
import mage.filter.FilterPermanent;
import mage.filter.predicate.Predicates;
import mage.filter.predicate.mageobject.CardTypePredicate;
import mage.game.Game;
import mage.game.permanent.Permanent;

/**
 *
 * @author LevelX2
 */
public class LeylineOfSingularity extends CardImpl {

    private static final FilterPermanent filter = new FilterPermanent("nonland permanents");

    static {
        filter.add(Predicates.not(new CardTypePredicate(CardType.LAND)));
    }

    public LeylineOfSingularity(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.ENCHANTMENT},"{2}{U}{U}");
    
        // If Leyline of Singularity is in your opening hand, you may begin the game with it on the battlefield.
        this.addAbility(LeylineAbility.getInstance());

        // All nonland permanents are legendary.
        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new SetSupertypeAllEffect(Duration.WhileOnBattlefield, filter)));
        
    }

    public LeylineOfSingularity(final LeylineOfSingularity card) {
        super(card);
    }

    @Override
    public LeylineOfSingularity copy() {
        return new LeylineOfSingularity(this);
    }
}


class SetSupertypeAllEffect extends ContinuousEffectImpl {

    private final FilterPermanent filter;

    public SetSupertypeAllEffect(Duration duration, FilterPermanent filter) {
        super(duration, Layer.TypeChangingEffects_4, SubLayer.NA, Outcome.Detriment);
        this.filter = filter;
    }

    public SetSupertypeAllEffect(final SetSupertypeAllEffect effect) {
        super(effect);
        this.filter = effect.filter;
    }

    @Override
    public SetSupertypeAllEffect copy() {
        return new SetSupertypeAllEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        for (Permanent permanent: game.getBattlefield().getActivePermanents(filter, source.getControllerId(), source.getSourceId(), game)) {
                permanent.addSuperType(SuperType.LEGENDARY);

        }
        return true;
    }

    @Override
    public String getText(Mode mode) {
        return "All nonland permanents are legendary";
    }
}