  Observations of debris disks, the products of the collisional evolution of
rocky planetesimals, can be used to trace planetary activity across a wide
range of stellar types. The most common end points of stellar evolution are no
exception as debris disks have been observed around several dozen white dwarf
stars. But instead of planetary formation, post-main-sequence debris disks are
a signpost of planetary destruction, resulting in compact debris disks from the
tidal disruption of remnant planetesimals. In this work, we present the
discovery of five new debris disks around white dwarf stars with gaseous debris
in emission. All five systems exhibit excess infrared radiation from dusty
debris, emission lines from gaseous debris, and atmospheric absorption features
indicating on-going accretion of metal-rich debris. In four of the systems, we
detect multiple metal species in emission, some of which occur at strengths and
transitions previously unseen in debris disks around white dwarf stars. Our
first year of spectroscopic follow-up hints at strong variability in the
emission lines that can be studied in the future, expanding the range of
phenomena these post-main-sequence debris disks exhibit.
