How to use

ReplacementEffectImpl

in

mage.abilities.effects

@Override
public void init(Ability source, Game game) {
  super.init(source, game);
  if (commanderId == null) {
    throw new IllegalArgumentException("commanderId has to be set");
  }
}

@Override
public void init(Ability source, Game game) {
  super.init(source, game);
  if (amountToPreventDynamic != null) {
    amountToPrevent = amountToPreventDynamic.calculate(game, source, this);
  }
}

@Override
public void init(Ability source, Game game) {
  this.damageSource.choose(Outcome.PreventDamage, source.getControllerId(), source.getSourceId(), game);
  super.init(source, game);
}

@Override
public void init(Ability source, Game game) {
  this.target.choose(Outcome.PreventDamage, source.getControllerId(), source.getSourceId(), game);
  super.init(source, game);
}

@Override
public void init(Ability source, Game game) {
  this.wonFlip = game.getPlayer(source.getControllerId()).flipCoin(source, game, true);
  super.init(source, game);
}

@Override
public void init(Ability source, Game game) {
  super.init(source, game);
  if (baseCondition instanceof LockedInCondition) {
    condition = new FixedCondition(((LockedInCondition) baseCondition).getBaseCondition().apply(game, source));
  } else {
    condition = baseCondition;
  }
  effect.setTargetPointer(this.targetPointer);
  effect.init(source, game);
  if (otherwiseEffect != null) {
    otherwiseEffect.setTargetPointer(this.targetPointer);
    otherwiseEffect.init(source, game);
  }
  initDone = true;
}

@Override
public void init(Ability source, Game game) {
  super.init(source, game);
  Player player = game.getPlayer(getTargetPointer().getFirst(game, source));
  Permanent mageObject = game.getPermanentOrLKIBattlefield(source.getSourceId());
  if (player != null && mageObject != null) {
    ChoiceColor choice = new ChoiceColor();
    if (!player.choose(outcome, choice, game)) {
      discard();
      return;
    }
    if (!game.isSimulation()) {
      game.informPlayers(mageObject.getLogName() + ": " + player.getLogName() + " has chosen " + choice.getChoice());
    }
    game.getState().setValue(mageObject.getId() + "_color", choice.getColor());
    mageObject.addInfo("chosen color", CardUtil.addToolTipMarkTags("Chosen color: " + choice.getChoice()), game);
  }
}