A Journey Through History is a four chapter set of PvE events that were launched in May 2018 with the Dominaria set. Each chapter is run as a Standard PvE weekday event, typically with two events being run in the same week.
Unlike other single-player events without charges, winning on a node you've already beaten continues to earn ribbons, so it is possible to collect all rewards simply by repeating the first opponent.
The event has the following special features:
Color restriction
One or more nodes in this event can only be played by Planeswalkers of a specified color.
Permanent support
A permanent support affects play on one or more nodes.
Bonus cards
Players draw additional bonus cards from outside their library