System's Twilight Hint Guide:

Electric Fens

I don't know what the specific transformations do.

• Adds "C"s to the beginning and end of the word
• Increments the first letter and decrements the last, if possible
• Changes all occurences of:
  1. "Y" to "S"
  2. "H" to "K"
  3. "A" to "R"
  4. "M" to "E"
  5. "G" to "W"
  6. "E" to "N"
• Divides the word semantically by ten
• Removes all but the middle letter
• Changes all occurences of "N" to "W"