Frostheim key card
From Twilight Heroes Wiki
Frostheim key card
Plural: Unknown; currently impossible to determine
Every good villain (and villainess) employs the highest levels of access control. To be blunt, you just can't have low level faceless minions getting into area[sic] that are reserved for high level faceless minions. And, of course, you can't let any level of faceless minion get to places that are reserved for trusted henchmen. You aren't sure why this is the case; you've just always assumed it was a union rule or something.
Anyway, this looks very much like a trusted henchman-type card, and thus is probably pretty darn useful. Lucky you!
Miscellaneous Item
Item cannot be traded or sold
Item cannot traded, sold, or placed in a memento display
Item cannot be auto-sold
How Obtained