United in Stormwind Cards List & Guide
I don't see any reason to think this is real.
I mean, nobody in the history of HS has ever complained that a basic hero power is too good, right? Except maybe DH when it first released, but people got over that.
I'm calling BS :)
EDIT: The next line of text should also read: "All warlock cards ever made are eligible for a full dust refund"