Gold, ISO-8, and Catalysts
Gold, ISO-8 and Catalysts actually work together to improve your Champion's abilities. You need a certain quantity of ISO-8 to gain one level each time, and then you need Gold to actually infuse it into your character. After hitting max level, you can use Catalysts to increase your character’s rank unless that’s maxed out too. One and two-star Champions only unlock their later special moves when you increase their rank.
The sequel to the award winning Hellblade: Senua’s Sacrifice, Senua returns in a brutal journey of survival through the myth and torment of Viking Iceland. Intent on saving those who have fallen victim to the horrors of tyranny, Senua faces a battle of overcoming the darkness within and without.