↓ Transcript
Cavalcade: And so you created us.
Ferial: Indeed. But not all at once, as you well know.
Ferial: To complete my work, I required an ancilla...
Ferial: ...but the Forerunners had not yet created one capable of meeting my need.
Ferial: The most powerful of their metarch-level ancilla was merely Contender-class.
Ferial: It would have crumbled in but seconds under the strain of my task.
Ferial: So I designed a new one, a Coalition-class ancilla...
Ferial: ...of which you, Fortuitous Destiny, were the first part.