Blackwater
Blackwater is the mysterious Holy Grail fluid that instantly heals wounded Knights and prolongs their lives for hundreds of years. Every Knight has a personalized flask of Blackwater kept on a chain around his or her neck.
If Galahad takes too much damage he collapses to the ground in a downed state, unable to do anything but crawl slowly. Be ready! After a few seconds the 
prompt appears. Immediately press the button: Galahad drinks from his flask of Blackwater and recovers.
Don’t stop there! When the 
prompt subsequently appears, tap that button rapidly to increase both Galahad’s health and his Blacksight meter.
Blacksight
Blacksight is your Knight’s near-supernatural ability to slow down the world while letting you auto-target enemies and shoot your secondary weapon at full speed. Press 
to activate it. Your targeting reticle immediately auto-centers on the closest target, so quickly pull 
to fire.
When the reticle turns red, that targeted foe is taken out. Quickly push the right stick toward the next target. The targeting reticle instantly jumps and auto-locks on him. Shoot again!
This all happens very fast, so you can take out a number of enemies quickly. But Blacksight is a timed state, available for just a few seconds. How much Blacksight you have left is shown on the meter bar beneath your weapon info at the bottom right of the screen. This bar starts emptying the moment you activate your Blacksight. Don’t waste it! Keep shooting and toggling to new targets until the meter runs out.
The Blacksight Meter
The white segment of the bar shows how much Blacksight is left; when no Blacksight is available, the meter’s bar is gray. Note that Blacksight cannot be activated if the meter hasn’t filled past the hashed area at the left of the bar.
