UncheckedGrowth.java example

Explorer
mage-master
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package mage.cards.u;

import mage.abilities.Ability;
import mage.abilities.effects.ContinuousEffectImpl;
import mage.abilities.effects.common.continuous.BoostTargetEffect;
import mage.abilities.keyword.TrampleAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.*;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.target.common.TargetCreaturePermanent;

import java.util.UUID;

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

    public UncheckedGrowth(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.INSTANT},"{2}{G}");
        this.subtype.add("Arcane");

        
        // Target creature gets +4/+4 until end of turn. 
        this.getSpellAbility().addEffect(new BoostTargetEffect(4, 4, Duration.EndOfTurn));
        // If it's a Spirit, it gains trample until end of turn.
        this.getSpellAbility().addEffect(new UncheckedGrowthTrampleEffect());
        this.getSpellAbility().addTarget(new TargetCreaturePermanent());
    }

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

    @Override
    public UncheckedGrowth copy() {
        return new UncheckedGrowth(this);
    }
    
    private static class UncheckedGrowthTrampleEffect extends ContinuousEffectImpl {

        public UncheckedGrowthTrampleEffect() {
            super(Duration.EndOfTurn, Layer.AbilityAddingRemovingEffects_6, SubLayer.NA, Outcome.AddAbility);
            staticText = "If it's a Spirit, it gains trample until end of turn";
        }

        public UncheckedGrowthTrampleEffect(final UncheckedGrowthTrampleEffect effect) {
            super(effect);
        }

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

        @Override
        public boolean apply(Game game, Ability source) {
            int affectedTargets = 0;
            for (UUID permanentId : targetPointer.getTargets(game, source)) {
                Permanent permanent = game.getPermanent(permanentId);
                if (permanent != null && permanent.hasSubtype("Spirit", game)) {
                    permanent.addAbility(TrampleAbility.getInstance(), game);
                    affectedTargets++;
                }
            }
            return affectedTargets > 0;
        }

    }
}