In order to help you upgrade your Clan Capital faster, we've added an additional 2000 Capital Gold to the silver track of the Season Challenges!
Furthermore, if you haven't completed the Clan Capital practice attack yet, there's 2610 Capital Gold waiting for you there as well!
And finally, if your Clan is feeling a bit lost on what to upgrade next, check out this upgrade guide by Itzu with some progression tips:
Clash On!