Practicing doing the new Destiny 2 Salvation's Edge boss mechanic - decided to put it all 3 types in a video.
Also, just in case somebody ever calls me out for my low skill play and asks why I joined a kwtd Salvation's Edge raid - I have a video showing I knew what to do - and failed 😭🤣
Summary of mechanic: get in the target hand's gold goo and shoot bracelet, get the color, go get the resonance buff for the color (green = triangle[sky], red = square [wall], yellow = circle [floor]), go back the gold goo of the target bracelet and shoot while having the other correct resonance. That gives you glyph breaker and you can shoot a button - rinse repeat 6 times and you can do DPS.
There is also a test mechanic that occurs when you break a hand and it explodes with an audio cue. If it was sky shoot the targets in front of the Witness that leave a Triangle (3 outside top left and top right), if floor shoot all 4 corners and the 2 just below the top line to leave a circle, if wall shoot the 6 inside targets not on the outside line to leave a square. Then warn the fireteam to jump and tell them to jump when the witness pushes out all his arms.