I could kill Arthus at one of the beginners stages with 3 blue stones, even though he had a reflecting shield and should not receive any damage by blue heroes. He was not on fire, nor did he have any other damage over time active.
I don’t have a screen or something else as I didn’t expect it to happen and I don’t want to throw away my energy to test it. Maybe it could be tested by someone at beta?
I would be happy to do it by myself, but as SG didn’t choose me for beta, I need the help of someone else.