The Aegis (XC2)

The Aegis is one of 's Battle Skills in Xenoblade Chronicles 2.

The specific list of effects is as follows:
 * The rate of all party Drivers is raised to 100%.
 * Enemy resistance is reduced by 50%.
 * Party evasion and accuracy are increased by 50% (an identical effect to Foresight at maximum level).
 * Item drop rates are doubled.

Overview
It is difficult to overstate how good this skill is. Even during optimised postgame play when Pneuma's direct damage tends to be less potent than that of other Blades, using Pneuma typically still leads to a damage increase as everyone else will be critting with every hit — a strictly better version of Warrior Valkyrie, which is itself a fantastically strong Battle Skill. Reducing enemy Break resistance is also a terrific boon at all stages of play, but especially during postgame when Fusion Combos become paramount gameplay elements. Foresight's evasion/accuracy buff makes Rex with Pneuma even more effective as a tank, both making him substantially harder to kill and reducing the chance that stray AOE attacks will hit party members. Increased item drop rate is not itself useful in combat but may be used to substantially speed up Core Crystal farming.