Ultinum is a minor currency that is obtained and spent in Expeditions. It can be gained with Ultinum Expeditions and through Expeditions Arena Challenges. It is spent on Fuel upgrades in the Fuel Station and on unlocking the second and third ships; a total of 175 Ultinum is required to unlock them.
Ultinum is also used to unlock and upgrade ships in the Expeditions Arena (separate from Expeditions ships).
Ways to obtain Ultinum: