Hearthpwn

What do you call the opposite of power creep? Power seep?

Actually thats a lot of epic filler cards.

It says NEXT hero power so if they use it one time with the 3 mana then the hero power will return to 2 mana. Plus i do think it is a little weird description.

I like the flavor and the mechanic if this card. But i don't think it's strong enough to secure a spot in (competitive) decks. 

I upvote you, don't know why you are getting mass downvotes... 

Does say :" cost (3)"

Doesn't say "...more"

No, it won't cost 12, because it sets the cost to 3 mana, not increases.

Not reading it right. Lul

"How are you guys not reading it right?"

LUL

Hello?

Hello to you too. 

Read the card again? There isn't a turn limit. 

Oh shit, it is actually permanent? This is amazing for the dragon hero meta then.

Instead of useless downvoting, people could explain properly how this card works, if blizzard can not do it themselves and making everyone confused

It seems as if you're getting confused and hallucinating that the word "more" is on this card. 

This card's Battlecry simply sets the cost of their next Hero Power to 3 mana. It does not increase the cost of their next Hero Power by 3 mana.

Yes, I get it, it will be 3 mana. But will it STAY at 3 mana or go to normal after using to 2?

Your opponents next hero power. Thus 1 turn only.

Not 1 turn only. 1 hero power use only, doesn't matter in what turn.