Mass. Gen. Laws ch. 183 § 10
A deed in substance following the form entitled "Warranty Deed" shall when duly executed have the force and effect of a deed in fee simple to the grantee, his heirs and assigns, to his and their own use, with covenants on the part of the grantor, for himself, his heirs, executors, administrators and successors, with the grantee, his heirs, successors and assigns, that, at the time of the delivery of such deed, (1) he was lawfully seized in fee simple of the granted premises, (2) that the granted premises were free from all encumbrances, (3) that he had good right to sell and convey the same to the grantee and his heirs and assigns, and (4) that he will, and his heirs, executors and administrators shall, warrant and defend the same to the grantee and his heirs and assigns against the lawful claims and demands of all persons.
Mass. Gen. Laws ch. 183, § 10