Wiki
Beryllium - Post Office Penner
Atom
World 3
Effect
Every day, 1 silver pen from your Post Office will instantly convert into 1 PO Box for all characters. This conversion happens 7 times per day.
Cost for this level: 75
Details
Base max level
20 (raised by the Isotope Discovery superbit, the Atomic Potential compass upgrade and the Higgs Boson event shop bonus)