BlasphemousAct.java example

Explorer
mage-master
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package mage.cards.b;

import mage.abilities.Ability;
import mage.abilities.SpellAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.common.DamageAllEffect;
import mage.abilities.effects.common.cost.CostModificationEffectImpl;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.*;
import mage.filter.common.FilterCreaturePermanent;
import mage.game.Game;
import mage.players.Player;
import mage.util.CardUtil;

import java.util.UUID;


/**
 * @author nantuko
 */
public class BlasphemousAct extends CardImpl {

    public BlasphemousAct(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.SORCERY},"{8}{R}");
        
        // Blasphemous Act costs {1} less to cast for each creature on the battlefield.
        Ability ability = new SimpleStaticAbility(Zone.ALL, new BlasphemousCostReductionEffect());
        ability.setRuleAtTheTop(true);
        this.addAbility(ability);
        
        // Blasphemous Act deals 13 damage to each creature.
        this.getSpellAbility().addEffect(new DamageAllEffect(13, new FilterCreaturePermanent()));
    }

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

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

class BlasphemousCostReductionEffect extends CostModificationEffectImpl {

    BlasphemousCostReductionEffect() {
        super(Duration.WhileOnStack, Outcome.Benefit, CostModificationType.REDUCE_COST);
        staticText = "{this} costs {1} less to cast for each creature on the battlefield";
    }

    BlasphemousCostReductionEffect(BlasphemousCostReductionEffect effect) {
        super(effect);
    }

    @Override
    public boolean apply(Game game, Ability source, Ability abilityToModify) {
        Player player = game.getPlayer(source.getControllerId());
        if (player != null) {
            int reductionAmount = game.getBattlefield().count(new FilterCreaturePermanent(), source.getSourceId(), source.getControllerId(), game);
            CardUtil.reduceCost(abilityToModify, reductionAmount);
            return true;
        }
        return false;
    }

    @Override
    public boolean applies(Ability abilityToModify, Ability source, Game game) {
        if ((abilityToModify instanceof SpellAbility) && abilityToModify.getSourceId().equals(source.getSourceId())) {
            return game.getCard(abilityToModify.getSourceId()) != null;
        }
        return false;
    }

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