  The Nancy Grace Roman Space Telescope's (RST) Wide Field Imager (WFI) is
equipped with a slitless prism that can be used for spectroscopic discovery and
follow-up of explosive transients at high redshift as part of its High Latitude
Time Domain Survey. This is new and unique spectroscopic capability, not only
for its original purpose for cosmology, but also for other types of explosive
transients. This white paper is intended to help make this new capability more
clear to the community. The depth of the RST prism compared to ground-based
spectrographs is explored, showing that the RST prism will be unrivaled in the
observer-frame NIR. The influence of the selected sky locations on the speed
and homogeneity of a RST prism survey is also estimated. This unique new
capability should be considered when balancing the HLTDS time devoted to
cadenced imaging and spectroscopy.
