W. Va. Const. art. VIII, § 6

Circuit courts shall have control of all proceedings before magistrate courts by mandamus, prohibition and certiorari.

Circuit courts shall have original and general jurisdiction of all civil cases at law where the value or amount in controversy, exclusive of interest and costs, exceeds one hundred dollars unless such valueor amount is increased by the Legislature; of all civil cases in equity; of proceedings in habeas corpus, mandamus, quo warranto, prohibition and certiorari; and of all crimes and misdemeanors. On and after January one, one thousand nine hundred seventy-six, the Legislature may provide that all matters of probate, the appointment and qualification of personal representatives, guardians, committees and curators, and the settlements of their accounts, shall be vested exclusively in circuit courts or their officers, but until such time as the Legislature provides otherwise, jurisdiction in such matters shall remain in the county commissions or tribunals existing in lieu thereof or the officers of such county commissions or tribunals.

Circuit courts shall have appellate jurisdiction in all cases, civil and criminal, where an appeal, writ of error or supersedeas is allowed by law to the judgment or proceedings of any magistrate court, unless such jurisdiction is conferred by law exclusively upon an intermediate appellate court or the supreme court of appeals.

Circuit courts shall also have such other jurisdiction, authority or power, original or appellate or concurrent, as may be prescribed by law.

Subject to the approval of the supreme court of appeals, each circuit court shall have the authority and power to establish local rules to govern the court.

Subject to the supervisory control of the supreme court of appeals, each circuit court shall have general supervisory control over all magistrate courts in the circuit. Under the direction of the chief justice of the supreme court of appeals, the judge of the circuit court, or the chief judge thereof if there be more than one judge of the circuit court, shall be the administrative head of the circuit court and all magistrate courts in the circuit.