Mirage is quite literally the "poster girl" for Update 14, one of the biggest updates of the game so far, and being a powerful Warframe that you obtain via side quests, this makes Mirage a good topic for my how-to guides.
The hardest part is getting your feet wet
The Hidden Message can be crafted with:
+ 5000 credits
+ 4 Oxiums
+ 5 Orokin Ciphers
+ 1 Argon Crystal
The process takes 6 hours. You can get credits by completing missions and selling items, Oxiums by doing Corpus mission and taking down Oxium Osprey (floating drones with an orange colour), and Argon Crystals by doing boss battles and Void missions. Orokin Ciphers are a bit trickier to get, however, since it can only be obtained by opening Orokin Derelict Vaults.
(step-by-step guide with pictures on how to get Orokin Ciphers HERE)
Once you crafted the item, the quest "Hidden Messages" will be unlocked in the Codex. Head to the Codex and begin the quest.
The first of the three
The answer to the first riddle is Olympus - the name of the mountain that "ancient gods so cruel, once ruled on high" - famous Mount Olympus from Greek mythology. Olympus is a mission on Mars.
Fun fact - Olympus on Mars is the tallest active volcano in the Solar System, peaking out of Mars' atmosphere itself!
Second part for the system
The answer to the riddle is Calypso, the nymph that held Odysseus from going home to his wife Penelope in Greek mythology. Calypso is a mission on Saturn.
The last riddle
Reap your reward - the trickster Warframe is ready
I'll get to helping you out with your questions.
Click these links for my other Warframe posts:
* Warframe - Failed to Join Session (PC fix): (part 1) (part 2) (part 3)
* Warframe - How to Invite Friends (Update 14)
*Warframe - How to get a Kubrow (step-by-step with pictures)