Ok I've been trying this glyph out, because of its potential to warrior tanking yet after a few attempts and a test with a friend the glyph seemingly does nothing. I still need to target a player, I am wondering if this is a bug or not, or does the player need to be below a certain % of health for it to work.
Also I have made sure they're within 25 yards, and tried it with both Safeguard and Intervene, both not working without me targeting someone.
Thanks for your Feedback.