  To reach ultra-low detection thresholds necessary to probe unprecedentedly
low Dark Matter masses, target material alternatives and novel detector designs
are essential. One such target material is superfluid $^4$He which has the
potential to probe so far uncharted light Dark Matter parameter space at
sub-GeV masses. The new ``Direct search Experiment for Light dark matter'',
DELight, will be using superfluid helium as active target, instrumented with
magnetic micro-calorimeters. It is being designed to reach sensitivity to
masses well below 100\,MeV in Dark Matter-nucleus scattering interactions.
