[
    new MagicWeakenCreatureActivation(
        [
            MagicCondition.CAN_TAP_CONDITION,
            MagicConditionFactory.ChargeCountersAtLeast(1)
        ],
        new MagicActivationHints(MagicTiming.Removal),
        "-1/-1"
    ) {
        @Override
        public MagicEvent[] getCostEvent(final MagicPermanent source) {
            return [
                new MagicTapEvent(source),
                new MagicRemoveCounterEvent(source,MagicCounterType.Charge,1)
            ];
        }
    },
    new MagicAtUpkeepTrigger() {
        @Override
        public MagicEvent executeTrigger(
                final MagicGame game,
                final MagicPermanent permanent,
                final MagicPlayer upkeepPlayer) {
            return (permanent.isController(upkeepPlayer) && 
                    permanent.getCounters(MagicCounterType.Charge) == 0) ?
                new MagicEvent(
                    permanent,
                    this,
                    "Sacrifice SN."
                ):
                MagicEvent.NONE;
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicSacrificeAction(event.getPermanent()));
        }
    }
]