Commune with the next Crux of Darkness in Bray Exoscience.
The Splinter of Darkness pulses in attunement with the Ziggurat. The second lesson is that of resistance. Be mindful. Guard your emotions against the temptations of the Darkness as well as your own fear in wielding it. This will help you resist any attack on or off the battlefield. Put that into practice when you find the next Crux.