Hearthpwn

But late game cards can only be used when you have the mana to do so, like you’ve said. 1-mana Discover cards can be used at any point of the game and can find an answer for any situation.

So take Pyroblast for example, if you put it in your deck it’s useless in every game you play that doesn’t go to 10-mana, and even then it may not be of any use if your opponent is high on life. If you play Wand Thief on Turn 9 however and it’s one of the options and your opponent is on 10 life, it’s likely an easy pick.

That’s the point, it’s often far more consistent to just play Wand Thief and look for late game stuff in the games it’s needed than it is to hard run the card itself.

A fairer card would be something like - 9-Mana “Discover a card that costs (8) or more, it costs (0)” 

Ranked floors completely eliminate any ranked anxiety you might have. 

Every time you hit a rank 10 or 5 you cannot fall back below it no matter how much you lose. And if your MMR is tanked enough you will mostly face janky control and combo decks.