Portals
Banned
Open up your MPQ Editor and Custom Open MPQ
Find patch-enUS-3.MPQ inside your World of Warcraft Data directory and open it
Inside the patch go to Interface/FrameXML/GlobalStrings.lua and extract it anywhere
Right click and edit with notepad++ and search for "ITEM_HEROIC", then edit "Heroic" to whatever you want and wala.