Hearthpwn

Mage has spell counter paladin has it and now hunter has it, now we need rogue to have it

This card is amazing. Its not only a soft counter spell, it also waste alot of mana, If you cast a spell that cost 5 Mana you loose your 5 mana and then you have to cast it for 6 next turn, essentially making a 5 mana spell 11 mana.

Maybe it'll be worth it if it's Cost (2) more.

It's different from freezing trap, because any minion (or token) can trigger freezing trap, which means you might not even negate a whole card from the opponent.  But since almost all spells are whole cards played from hand this will explicitly stop something more impactful and consume the mana used, which is why the recast is only 1 more.

"Watch what happens when I cast a spell I don't know!"

Love it.  I am all for more spell counters.