BUG REPORT
I was immortal. Lol.
Level 5 difficulty. Battle against the cannon boss who becomes stronger and stronger. I had Urso 3' stage with Shattershard. I chose "Shakeoff" as his 3' stage ability.
Basically, everytime I was hit by the cannon boss and I should have died, I didn't. My theory is that, even if it hit me with 500+ damage, the 25hp heal of Shakeoff activated before death, letting me staying alive indefinitely.
Here is some pics I snapped at the moment:
