The Enigmatic Encryption Enigma

A Level 3 Challenge for the Discerning Cryptographer

You have made it to Level 3, where things get really interesting. The Enigmatic Encryption Enigma is a challenge that will test your skills in cryptanalysis, but be warned: the answer is not what you expect.

Here's the problem:

      Cipher: VGVV
      Plaintext: ABC
      Key: ???
    

Can you figure out the key and decrypt the message?

Good luck, you'll need it.

Next Level: The Unstable Unicorn Cipher