W. Va. Code § 36-4-6: Freedom from encumbrances.

A covenant, by any grantor in a deed, containing the words "free from all encumbrances," or a covenant of like import, shall have the same effect as if the grantor had covenanted for himself his heirs and personal representatives, that the premises are freely and absolutely acquitted, exonerated and forever discharged, and the grantee, his heirs and assigns, will be saved harmless and indemnified of, from and against any and every charge and encumbrance whatever.