Method canPay

forge-game/src/main/java/forge/game/cost/CostUntap.java:79–84

(final SpellAbility ability, final Player payer, final boolean effect)

    }

    @Override
    public final boolean canPay(final SpellAbility ability, final Player payer, final boolean effect) {
        final Card source = ability.getHostCard();
        return source.canUntap(null, false) && !source.isAbilitySick() &&
                (source.getCounters(CounterEnumType.STUN) == 0 || source.canRemoveCounters(CounterEnumType.STUN));
    }

    @Override
    public boolean payAsDecided(Player ai, PaymentDecision decision, SpellAbility ability, final boolean effect) {