The MAYAN RELIC is hidden by a form of cipher called a CAESARIAN SHIFT CIPHER.
Using the decoded letters from the clue, you will have to reverse this cipher to unveil the hint to the location of the Relic.
In a Caesarian Shift Cipher, each letter has been shifted the same number of letters either up or down the alphabet. i.e. if the letter C is shifted 1 letter down the alphabet it becomes letter D. You'll have to shift each letter one by one the same number of times to unveil the clue.