Hearthpwn

I obtained Dreaming Drake from Alex, so it becomes 1 mana. However, after corrupting it, it becomes 3 mana corrupted version. Is this meant to be? I don't think other corrupt cards reverse back to original mana cost. 

Corrupted cards are different from normal ones. 

As enoX_36 already mention corrupted cards are a different card that, as such their not only reverse back to original mana cost but also loose any hand buffs etc.

Quote from DeathDragon >>

As enoX_36 already mention corrupted cards are a different card that, as such their not only reverse back to original mana cost but also loose any hand buffs etc.

 No they don't. They keep all handbuffs and discounts. This is a bug.

https://hearthstone.gamepedia.com/Corrupt#:~:text=Corrupt is an ability introduced,card and gain additional effects.

Nope. Corrupted cards are supposed to keep all buffs. I tried before with discounted Tikatus due to Free Admission. Corrupted Tikatus remains as 4 mana. 

I believe it's something related to dragonqueen alexstrasza. If you get Tent Trasher it won't be reduced to 0 mana unless you have 5 different tribes on board.

What if u draw a card from passage corrupt one of the cards and dont play it? Does it remains in your hand or goes back to the deck?

Quote from Marega >>

What if u draw a card from passage corrupt one of the cards and dont play it? Does it remains in your hand or goes back to the deck?

 It stays in hand.