Posted 6 Dec 2016 What is it and how can I get it upgraded? Share this post Link to post Share on other sites
Posted 7 Dec 2016 Seal rank is your Gem Mark rank. it is upgraded under Gems in the Mark tab. Share this post Link to post Share on other sites
Posted 7 Dec 2016 The stones necessary to "rank up" can be purchased with gold or earned in the Robot Challenge unlocked at high levels. Share this post Link to post Share on other sites
