Most Rare Earth Magnets are perhaps brittle. However there are a multitude of rare Earth metal alloy combinations to work with, and chances are that an induction coil could be spun from an extremely thin magnetic and conductive rare earth metal wire that's 100's of miles long.

When immersed in liquid helium producing almost superconductivity. The properties of the coil could become very interesting.

When charged with electricity it could? perhaps become a super-power rare earth magnet?

It could become a very compact electricity storage cell?

Given either possibility it would be a very valuable effect that could be used in the manufacture of technology.

It's hard to believe that mercury is the only room-temperature liquid metal. Attempts to make a liquid mercury alloy with rare earth metals would give fantastic applications in technology.

Essentially it would be an alloy molecule of mercury and rare earth metals, that's liquid but each molecule aligns North to South increasing its surface tension to a spongy blob that would stick to steal like a magnet and have the properties of a very viscous magnetic liquid metal.