One of the most important changes when Standard was released was that with Naxxramas and Goblins cycling out, Hearthstone would rely far less on randomness. We lost cards like Unstable Portal, Piloted Shredder, and Imp-Losion, and Knife Juggler was nerfed as well. I, like many others, believed that Hearthstone’s competitive play would no longer have the powerhouses that rely on massive amounts of RNG. While the game has gotten quite a bit better in terms of RNG reliance, there are certainly several perpetrators that remain prevalent in top constructed decks.
The biggest problem with heavily RNG reliant cards isn’t the RNG in and of itself, it’s how great a power it has to swing the game, and how easy they are to play around. For example, Ragnaros’s RNG isn’t bad RNG because it’s late in the game, he can be expected, he represents a large threat, and his RNG can easily be managed down to a few possible targets. Bad RNG comes into play when the cards have the power to sway the game too early to be played around, and they represent game winning plays before either player has had a chance to actually play a significant portion of the game. Reynad talks about the difference in good and bad RNG here. Without further ado, my list for the worst cards in Standard.