I think it is somewhat skill-testing (unlike most of the other demon hunter cards). Really strong with the summon 6 Illidaris with rush. But I have seen it played very suboptimally. It is also very fragile at only 1 HP. There are more broken cards in the DH arsenal for sure (Antean, Skull, Priestess, etc.).
I don’t know how skill intensive that combo is. the punishment is for having any minion on the board and will either clear a board of 5/5’s or clear most of em and deal 6 face dmg. I’m also not saying that there are not other broken cars but I’ve had like 4 games where that combo kill my 8Hp minion and I got 3/5 at least every time hit face and that’s 9+ dmg. Kinda a lot for 8 mana, chance at a large board clear and face dmg. That draw three and reduce card is also hilariously busted.