How to use

getValue

method

in

mage.abilities.effects.common.EntersBattlefieldWithXCountersEffect

@Override
public boolean apply(Game game, Ability source) {
  Permanent permanent = game.getPermanent(source.getSourceId());
  if (permanent == null) {
    if (source.getAbilityType() == AbilityType.STATIC) {
      permanent = game.getPermanentEntering(source.getSourceId());
    }
  }
  if (permanent != null) {
    SpellAbility spellAbility = (SpellAbility) getValue(EntersBattlefieldEffect.SOURCE_CAST_SPELL_ABILITY);
    if (spellAbility != null
        && spellAbility.getSourceId().equals(source.getSourceId())
        && permanent.getZoneChangeCounter(game) == spellAbility.getSourceObjectZoneChangeCounter()) {
      if (spellAbility.getSourceId().equals(source.getSourceId())) { // put into play by normal cast
        int amount = spellAbility.getManaCostsToPay().getX();
        if (amount > 0) {
          Counter counterToAdd = counter.copy();
          counterToAdd.add(amount - counter.getCount());
          List<UUID> appliedEffects = (ArrayList<UUID>) this.getValue("appliedEffects");
          permanent.addCounters(counterToAdd, source, game, appliedEffects);
        }
      }
    }
  }
  return true;
}