I'm not completelie sure but when u build everything for balance vallie u go to the future and u get something from the Sage....or it's when u beat the memo-monger thing...like i said, i'm not completelie sure
The first thing you need to do is complete the Georama part that enables you to build star items. Once you have done this go to the future and purchase the Starglass. Then use it at the destroyed lighthouse.
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