I was making a video when it happens so there's no better way to all of you can see it by yourself:
https://www.youtube.com/watch?v=srLrY7X9prsI played in round 1 and the opponent have attached but is like i hasn't played anything, the opponents have the -6 dmg suffered effect active, and the next round -4 dmg.
I don't know. Or it is a huge mistake in the description of the card or it is a bug.
So i hope any one can fix it soon cause that card is so damn good, and with bugs even more.