Just a few minutes ago I was in a raid facing Musashi in the far right slot and when Musashi’s special was triggered my own Hero in the far right slot was reduced to zero hp from full or almost full health in addition to the damage done to 3 of my heroes on the left. Below is the screen shot…
Chao, Boldtusk, and Hel all received the special animation and attack results but as you can see, Isarnia, who had over 1000hp at the time, was completely destroyed even though she should not have been targeted in the attack. Also no special animation was displayed when she lost her hp. Somehow enough damage was applied to her when the Musashi Special launched that she was killed in the same turn. It did not appear that any of the other defenders had regular attacks against her either.