mage/Mage.Sets/src/mage/cards/c/CabalTherapy.java

package mage.cards.c;

import mage.MageObject;
import mage.abilities.Ability;
import mage.abilities.costs.common.SacrificeTargetCost;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.ChooseACardNameEffect;
import mage.abilities.keyword.FlashbackAbility;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.cards.Cards;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.filter.StaticFilters;
import mage.game.Game;
import mage.players.Player;
import mage.target.TargetPlayer;
import mage.target.common.TargetControlledCreaturePermanent;
import mage.util.CardUtil;

import java.util.UUID;

/**
 * @author jonubuu
 */
public final class CabalTherapy extends CardImpl {

    public CabalTherapy(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{B}");

        // Name a nonland card. Target player reveals their hand and discards all cards with that name.
        this.getSpellAbility().addEffect((new ChooseACardNameEffect(ChooseACardNameEffect.TypeOfName.NON_LAND_NAME)));
        this.getSpellAbility().addTarget(new TargetPlayer());
        this.getSpellAbility().addEffect(new CabalTherapyEffect());

        // Flashback-Sacrifice a creature.
        this.addAbility(new FlashbackAbility(this, new SacrificeTargetCost(
                new TargetControlledCreaturePermanent(StaticFilters.FILTER_CONTROLLED_CREATURE_SHORT_TEXT)
        )));
    }

    private CabalTherapy(final CabalTherapy card) {
        super(card);
    }

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

class CabalTherapyEffect extends OneShotEffect {

    public CabalTherapyEffect() {
        super(Outcome.Discard);
        staticText = "Target player reveals their hand and discards all cards with that name";
    }

    private CabalTherapyEffect(final CabalTherapyEffect effect) {
        super(effect);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player targetPlayer = game.getPlayer(targetPointer.getFirst(game, source));
        Player controller = game.getPlayer(source.getControllerId());
        MageObject sourceObject = game.getObject(source);
        String cardName = (String) game.getState().getValue(source.getSourceId().toString() + ChooseACardNameEffect.INFO_KEY);
        if (targetPlayer == null || controller == null || sourceObject == null || cardName == null) {
            return false;
        }
        Cards hand = targetPlayer.getHand().copy();
        targetPlayer.revealCards(source, hand, game);
        hand.removeIf(uuid -> {
            Card card = hand.get(uuid, game);
            if (card == null) {
                return true;
            }
            return !CardUtil.haveSameNames(card, cardName, game);
        });
        targetPlayer.discard(hand, false, source, game);
        return true;
    }

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