Blizzard’s Team 5 today announced the details of the balance changes that are coming to Hearthstone on October 18. They are:
Giggling Inventor:
The neutral minion Giggling Inventor will now cost 7 mana. (Up from 5.)
Mana Wyrm:
Source: IGN.com Hearthstone: Giggling Inventor is Being Nerfed into the Ground