Honestly, Shirou was beginning to think that he should be used to this; being unwittingly selected to take part in brutal tournament that he had no idea existed until he found himself in the middle of it. Then again, second times the charm, right?

Darkness brings more darkness. She was a failure of a mage, incapable of casting even the simplest spells. So of course, she had to go ahead and summon the single most talented mage of his generation as a familiar. Reboot at some point.