2x in a row Nokris nightfall 2nd to last knight drops ball but then ball disappears so I can't destroy the last rock and break her invisibility shield
I was using warcliff coil on the knights and they were being flown across map on several occasions. In the boss room the 2nd to last knight would die, drop the ball but the ball would then disappear leaving me with 1 less ball to destroy the invisibility shield and so I had to quit the nightfall. Restarted it and same thing happened again.