A new flux method for the crystal growth of rare earth-iron intermetallic compounds was developed. In this method, the rare-earth flux creeps up the inner surface of a BN-coated crucible during the cooling process, and free-standing crystals are left on the bottom of the crucible. This method was applied to the crystal growth of compounds in Sm-Fe and Nd-Fe systems, and crystals of SmFe2, SmFe3, Sm6Fe23, and Nd6Fe13-xAl1+x, were grown for the first time. In particular, SmFe7 is a new phase in the Sm-Fe system with high performance as a permanent magnet. Since the chemical composition of the mixture in the crucible changes in accordance with the creep-up of the flux, this method may be promising in the search for new phases as well as for the crystal growth of known materials.