Dark Sky Cystr Guide

: Focuses on rapid combat and point-to-point movement.

: Consult tools like LightPollutionMap.info to find non-certified but exceptionally dark spots. Dark Sky Cystr

: Use the Dark Sky Meter to measure night sky brightness and contribute to citizen science. Dark Sky - CYSTR : Focuses on rapid combat and point-to-point movement

: An alternative version of Sword Dance involving explosive Lucent Moths. Searing Light : An alternative version of Slayer. Dark Sky Cystr

If you are looking for "Cysts" in a "Dark Sky" (apocalyptic/sci-fi) setting, you are likely referring to the introduced in the Destiny 2: The Final Shape expansion. These missions involve navigating corrupted areas to clear "cysts" of Darkness.