I've been completely hooked on Hollow Knight: Silksong since it dropped in 2025, and after pouring more hours than I'd care to admit into this gem, the endgame secrets still manage to blow my mind. Among the coolest rewards are the Mementos — special trophies you earn by tackling hidden bosses and mini-games. One of the most elusive is the Grey Memento, and bagging it means going...