In order to go on a Journey, you must own the dragon and have the accompanying rider's house built. If these conditions have been met, you can select the dragon and choose the "Journey" option. There are multiple Journeys available for each dragon/rider, and sending them out has a small Rune cost and requires a certain amount of time to complete. More Journeys become available as your dragon levels up, so be sure to keep training them!

As the Journey progresses, you will encounter 3 crossroads. At each crossroad, you must make a decision between two options.  Depending on your choice, two reward options will be given. One is free to select, while the other may cost resources/Runes but holds a better reward. By the end of the Journey you will see the 3 reward options you chose on the Journey wheel. Which one you get is decided by the result of the wheel spin. The possible rewards are Eggs, Fish, Wood, Runes, Collection Items and Card Packs.

Note that dragons that can only be found in Journey will only be available through a Journey and cannot be bought in the Book of Dragons.