  We present our findings on magnetar spectral line analysis in the context of
upcoming high resolution, high effective area, high throughput X-ray telescopes
for two cases: persistent magnetar emission and magnetar bursts. For magnetars
in quiescence, we present our preliminary work on modelling for phase-resolved
emission. Our results reveal the necessity of constraining line depth and width
concurrently with line energy to conclusively determine hotspot emission and
corresponding magnetic field geometry. We then present the results of our
simulations using effective area and response of various current and upcoming
X-ray telescopes for magnetar spectral line detection and expand on the
exciting opportunities upcoming telescopes provide to probe quiescent and burst
emission region geometry and propagation in the extreme magnetic field of a
magnetar
