U.S.S. Excelsior Experimental Research
UNCOMMONWHAT IT'S FOR
Used to unlock and upgrade U.S.S. Excelsior research found in the Starships tree.
Gained from the U.S.S. Excelsior Strongbox in the Challenge Refinery, the Store, or Special Events.
No known way to earn or spend this on the site yet — it may come from a store, event or bundle that isn't tracked here.