Theory and Praxis

Theory and Praxis is a Blade Quest in Xenoblade Chronicles 2. It can be received by going to the in Fonsa Myma, Kingdom of Uraya, after unlocking both the fifth level of Praxis's Fierce Deluge  and Theory's second Key Affinity reward, and provided Nia, Tora, Mòrag, Zeke, Pyra, Praxis and Theory are in the party. Completing it will unlock Theory's third key affinity reward.

Quest objectives

 * Speak to the boys in Uraya Commercial District.
 * Approach Vaio and Veero in Uraya's Torika Alley.
 * Approach Vaio and Veero's father at Fonsa Myma Port, Uraya.
 * Defeat the Drivers (3) at Fonsa Myma Port, Uraya.
 * The three Drivers are Torst Driver, Avarr Driver and Firan Driver.
 * In Fonsa Myma Port, Uraya, speak to Volette.
 * In Commercial District, Uraya, speak to Brabe.
 * Gather ingredients from various regions and make Whelzaman Cookies (50).
 * Baking fifty cookies require a total of 25 s, 10 Sparklesugars, 10 es and 5 Limdo Flamii Eggs, commonly found at Bluestep Ditch.
 * Distribute Whelzaman Cookies to the children in Fonsa Myma, Uraya.
 * The cookies must be distributed to ten children. Renle requires a Wind Mastery and Leaping level 2 to be reached. While distributing the cookies, three quests will be automatically triggered: Boys and Bullies, Family vs. Fiends and Jeline and Shaun. They must all be cleared to progress.
 * Approach Vaio and Veero in Uraya Commercial District.

Results
"Theory and Praxis make themselves helpful to the townsfolk to atone for their past misdeeds."