Starting in 3.0, Standard in MtGPQ will follow tabletop MtG’s own Standard format with the single difference of Origins being always available. Sets will be added to Standard until it reaches 8 non-Origin sets. Once the ninth non-Origins Set is added, the oldest four non-Origins Sets will be moved to Legacy. (source: https://forums.d3go.com/discussion/75887/what-is-the-current-standard-format)