For those curious about Victor’s attack against a seemingly dead Kageburado: Kage was revived—you can see his minion pop up, but Victor immediately kills him, so he disappeared before the animation finished.
Kinda the same effect, I’m guessing, as clicking on a hero to check their hit points after an enemy has already started their attack animation but before the animation is finished. It will show the hero already with the attack damage subtracted from his or her total—even with zero hit points left.
It’s a cosmetic glitch (and a weird delay) that the devs might want to take a look at, @Petri , if they’re not already. Victor’s attack is at the one minute mark.