S.C. Code Ann. § 12-61-20

Such action shall be commenced, conducted and concluded by decree as are similar actions in such court and there may be made defendants to the action the former owner of such property, his heirs, executors, administrators, successors or assigns and any other person or legal entity who has or claims any right, title, claim, interest or lien in or to such property, to the end that such rights, titles, interests, claims or liens may be adjudicated in such action and forever barred by the judgment and decree of the court if such are found to be junior or subsequent to the title of the county or any person purchasing at or acquiring title to property through a tax sale.