Wild Down is one of Reyn's physical Arts in Xenoblade Chronicles. When used on an enemy inflicted with Break, the target will be Toppled. In Xenoblade Chronicles X, Wild Down is an art exclusive to the Shield Trooper class. It cost 1000 TP to use and can inflict Topple. It is tied to the Shield weapons and Cross can use it once learnt by equipping said weapon no matter the class he currently is.
Advanced art books are only available from enemy drops. For any enemies listed with a 0% drop rate, the item can only be obtained using Yoink!, Riki's Talent art.