It's a new building, which you can level up till infinity.
To level up you need 10000 points, for each level it's the same amount, you can use anything from your star menu. Any resource, any adventure,any buff.
Only each item give different amount of points, So a pinewood is 1 point, stone 2 points, etc.etc.
From time to time something falls down from this tower off course. The workers building the tower make mistakes, they drop something.
This will be a different kind of resource of a higher point value. During events it could be related to the event.
This way everyone can clean his star menu more use full and show everyone how far he is for reaching the heavens.