1) Enigmatically 2) In a cryptic manner 3) Mysteriously 1) Enigmatically 2) Mysteriously 
• (adv.) Secretly; occultly.
Cryp'tic·al·ly adverb Secretly; occultly. 
[adv] - in a cryptic manner
cryptic, cryptically 1. Deliberately mysterious and seeming to have a hidden meaning. 2. With an indirect solution or clue, e.g., crosswords, puzzles, or anagrams. 3. Secret or hidden in some way. 4. Using or relating to codes and similar techniques. 5. In zoology, used to describe body markings and color that camouflage an animal. ...
enigmatically adverb in a cryptic manner; `we will meet again,` he said cryptically