Credit card scammer's nightmare

Exploration Stage: Maze of Fear
From: Cardsharp
Description: Let me paint you a picture of the monster this card cheater is! It was late at night, I was walking home and this guy jumped out from around the corner, bared his fangs and threw something sharp at me. It's still there, check it out!
Completed: What do you think of this cannibal box? This guy threw a sharp coin at me! What kind of monster is this? Reminds me of the gambling debts I incurred when I was young...