Season Four

The fourth season is preceded by the Third Season. It debuted in 2015, and was finished in 2016. It follows Rex's entrance in the already started 2nd Galactic War. A rift forms between Rex and Ax, and war will test their friendship. Maya becomes the prime target of Toaros, and Ober must step forth to defend his people.

Synopsis
Rex continues to have nightmares of Toaros, and the fear begins to grip him. Ax and Maya are officially in a relationship, but Maya despises Rex for leaving her. Rex, Sentinel, Selda and Kell use the Blue Comet to go to Xyrox. They meet the Xoreans, who are working for Toaros, and they save the Cayrians. They return to Earth and warn them of the war. Ax, Maya and Ober go to Illiix, the Reyean homeland, while Rex, Sentinel, and Selda go to the Helix, an alliance formed by Rexian. On Illiix, they clash with Kerzid, lord of the Elxians, and Razan, an Addoxian warrior who has the same powers as Maya. Riin is killed and Ober steps forth as the new king.

Books

 * 1) The Nightmare
 * 2) The Iron Emperor
 * 3) The Divide
 * 4) The Reyean Kingdom
 * 5) The Fallen Prince
 * 6) The Helix
 * 7) Book 7
 * 8) Book 8
 * 9) Book 9

Facts

 * The fourth season is directly linked with the fifth season. Both together record the 2nd Galactic War.