The third and last set in the Magic: The Gathering Theros block is called "Journey into Nyx." Journey into Nyx, like its predecessors, features an olden top-down design with a Greek theme that uses several mythological tropes. It has 165 cards (60 Uncommon, 60 Common, 35 Rare and 10 Mythic) plus randomly inserted premium edition cards.  

Journey into Nyx is about a Theros plane that is in anarchy. The Gods and mortals are fighting each other as frightened monsters continuously the land. Heroes struggle for fame while frightening new constellations form in the sky at nighttime.

Journey into Nyx is sold in 15-card booster packs with Pharika (God of Affliction), Ajani (Mentor of Heroes) and Cyclops (Eternal Fury) artworks featured on the 15-card boosters. It also has the sequel to the Hero's Path.

So far, the spoilers that have been revealed include launch and game day promos; the bestow drawback cycle; the first of the new scry lands; promo cards and their equipment; Mythic Planeswalker Ajani, Mentor of Heroes; Sage of Hours, Mythic Hero of Time; Mythic Legendary Kruphix, God of Horizons; the buy a box promo Eidolon of Blossoms; and Eidolon of the Great Revel.

April 26 and 27 are the prerelease dates of Quest 7 on the Hero's Path. The prerelease pack has a Spindown Life Counter, one of the five Hero Equipment cards, one of the five quiz activity cards, a seeded booster with cards appropriate for the selected path of the player (depending on the color chosen), five Theros block boosters and one of the five prerelease promo cards. See your local gaming clubs and stores for information specific to their prerelease tournament packages and dates.

For those who are interested in Pro Tour information, the Journey into Nyx Pro Tour takes place May 16-18, 2014 in Atlanta.