Method canPay

forge-game/src/main/java/forge/game/cost/CostExile.java:172–287

(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();
        final Game game = source.getGame();

        String type = this.getType();
        if (type.equals("All")) {
            return true; // this will always work
        }
        else if (type.contains("FromTopGrave")) {
            type = TextUtil.fastReplace(type, "FromTopGrave", "");
        }

        CardCollection list = CardLists.filter(zoneRestriction != 1 ? game.getCardsIn(this.from) :
                payer.getCardsIn(this.from), CardPredicates.canExiledBy(ability, effect));

        if (this.payCostFromSource()) {
            return list.contains(source);
        }
        if (getType().equals("OriginalHost")) {
            return list.contains(ability.getOriginalHost());
        }

        boolean totalCMC = false;
        String totalM = "";
        if (type.contains("+withTotalCMCEQ")) {
            totalCMC = true;
            totalM = type.split("withTotalCMCEQ")[1];
            type = TextUtil.fastReplace(type, TextUtil.concatNoSpace("+withTotalCMCEQ", totalM), "");
        }
        boolean totalCMCgreater = false;
        if (type.contains("+withTotalCMCGE")) {
            totalCMCgreater = true;
            totalM = type.split("withTotalCMCGE")[1];
            type = TextUtil.fastReplace(type, TextUtil.concatNoSpace("+withTotalCMCGE", totalM), "");
        }

        boolean sharedType = false;
        if (type.contains("+withSharedCardType")) {
            sharedType = true;
            type = TextUtil.fastReplace(type, "+withSharedCardType", "");
        }

        int nTypes = -1;
        if (type.contains("+withTypesGE")) {
            String num = type.split("withTypesGE")[1];
            type = TextUtil.fastReplace(type, TextUtil.concatNoSpace("+withTypesGE", num), "");
            nTypes = Integer.parseInt(num);
        }

        if (!type.contains("X") || ability.getXManaCostPaid() != null) {
            list = CardLists.getValidCards(list, type.split(";"), payer, source, ability);
        }

        if (nTypes > -1 && AbilityUtils.countCardTypesFromList(list, false) < nTypes) {
            return false;
        }