public String checkMana() {
        StringBuilder result = new StringBuilder();
        if (manaColorless > 0) {
            result.append(manaColorless);
        }
        for (int x = 0; x < manaBlack; x++) {
            result.append(Color.Colors.B.toString());
        }
        for (int x = 0; x < manaBlue; x++) {
            result.append(Color.Colors.U.toString());
        }
        for (int x = 0; x < manaGreen; x++) {
            result.append(Color.Colors.G.toString());
        }
        for (int x = 0; x < manaRed; x++) {
            result.append(Color.Colors.R.toString());
        }
        for (int x = 0; x < manaWhite; x++) {
            result.append(Color.Colors.W.toString());
        }
        return result.toString();
    }