The 8 mana spell is great if you build your deck properly. Nefarian’s Tooth is maybe a little underpowered, but the HK isn’t hard to line up, come on.
Cost way to much for rogue fragile survavility, so, you are forced to try everything you can to play the card faster than that, what means at very minimum x2 Preparation and x2 tradeable weapon, you need early removal because people are running Trogs and Posts in desperation against the insanely OP totally out of balance druid.
You put some deathrattles after all this and the costs are crazy high to get any value of the spell, 5 at least and 8, the 10 manas elemental is just suicidal, if you draw is dead card forever.
When you finally play the card you draw preparations, removals, weapons and 1 or 2 deathrattles, the problem is, at this time druid already drawning treasures from his deck and you can’t make any pressure and aggro already kill you.
8 manas is death territory for rogue,even the hero card is bad at 8 manas, rogue don’t have the tools to reach this stage of the game anymore, the class is dead and buried.
You even tried to use it? No? Didn’t think so. There is no way your deck should be built that a card that draws FIVE CARDS whiffs. If that’s the case your deck needs more deathrattles. Also no, you don’t run the 8 or 10 cost deathrattle cards. The 4-6 costs are good enough, the whole deck is basically a midrange tempo deck. You run broom to give your deck some proactivity, to keep board control and it works very well.
Smoke screen is a top end card that is a huge tempo swing. It doesn’t matter that it’s expensive. Even if all the card does is summon an 5/8 taunt, that makes the card worth.
When you play your 1/1 deathrattle in turn 5 druid is playing the dragon 8/8 and treasures, you don’t have the chance to play the 8 manas spell, the deck don’t have enough early pressure to deal with this insane meta.
If you let druid just go off and do nothing but ramp maybe, but rogue can put lots of pressure on them, especially with sticky deathrattles they have trouble removing.
Also you don’t want to play the 5 cost deathrattle, you want to draw it with Smoke Screen. Which you can cheat out with Loan Shark coins too.
You don’t run the costly deathrattles. Don’t run costly deathrattles. The most expensive card besides smoke screen in your deck should be Legionnaire. MAYBE Owl, because Owl can do a lot of damage on an empty board. But I haven’t been sold on that.
Your big swing turn is snowfall grave → sketchy information.
there´s some differences between the classes obviously, priest is much more fine to just remove sth turn 3 with no gain than rogue most days.
also the payoff for priest is 100% guaranteed, while rogue is utterly random - which usually should make the card cheaper as a tradeoff. Also the card barely sees play in priest.
Tooth of nefarian is just one of the worst cards printed in a while.