Fate/stay night (2006)

S1E15 The Twelve Trials

After Archer falls to the formidable Berserker, Shirou, Saber, and Rin scramble to avoid a similar end. They manage to find a brief refuge, giving Shirou the chance to figure out how to restore Saber's mana while Ilya hunts for their location. Inspired by Archer's sacrifice, Rin becomes fiercely committed to their survival and devises a complex strategy. The tension escalates as Saber prepares to confront Berserker in an imminent battle.