Sparring with Roxana

Call to Arms was a virtual representation of one of Kassandra's genetic memories, relived by Layla Hassan through the Portable Animus HR-8.5.

Trivia

 * If the player talks with Roxama before getting the Call to Arms quest, the game will bug and this quest will never be available, only leaving the option to pay to start The Great Contender.

Reference

 * Assassin's Creed: Odyssey