You were using your three Saint Quartz obtained after your third campaign, saying the correct words or so you think, using the Saint Quartz Summon you summon... Illya?

Ah... Did I get summoned? Hah! Fine, fine—just don’t expect me to go easy on anyone. Let’s get this over with, Master! Ah... Wait, this... this isn’t right. A Berserker? But I’m supposed to be a mage! How did it come to this? Ugh