How I Unlocked Every Major Ability in Hollow Knigh Hollow Knight: Silksong Ancestral Arts and upgrades unlock new Metroidvania exploration abilities, transforming traversal and progression. I have spent the last few weeks digging into Hollow Knight: Silksong, and I can tell you that exploration is both freeing and quietly locked behind some crucial upgrades. If you are used to Metroidvania rules, you know the drill: you wander, hit a dead end, and realize you need a permanent ability to move forward.