Board Thread:Game Discussion/@comment-209.91.107.147-20130613002610/@comment-9477730-20130613050706

For upgrades, there is an exception.

The Transmetal value doesn't change during or outside of the event. So if you have extra transmetals, you can use it for upgrading.

I usually upgrade my top reward card with transmetals (54 x 3 = 162 TM), and save up the rest for future events (around 100-150 TM) ... I just didn't want to wait to see the new team's deck power. If I don't have that much TM (like 200), then I would sometimes upgrade partial with card & the rest with TM.

The other rewards would be upgrade during the next event.