The second tower upgrade quest given by Igor, he requires you to retrieve a ring in the possession of Stone(level 27) who is of course in charge of Stone's Flying Fortress.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.