The tenth extra booster will feature Bushiroad's most mysterious selection of clans: Gold Paladin, Great Nature, and Neo Nectar. These three clans aren't similar in either lore nor mechanics, so the surprise factor is at an all-time high! The Mysterious Fortune will contain 66 cards (three VR, six RRR, nine RR, 15 R, and 33 C). 57 of these will be new cards and nine will be reprints from past sets. The Mysterious Fortune will release on 20 December 2019.
If you want to be the fourth player in this enigmatic new trio, check back in November 2019 to learn more about the full set.