Guard Shift

Guard Shift is a reccuring Art in the Xenoblade series. In Xenoblade Chronicles it is both one of Reyn's Ether art and one of Fiora's Ether art. In Xenoblade Chronicles 2 it is one of Hugo Ardanach's Defensive art.

Reyn
Reyn's version of the art increase his blockrate by 100% and prevent him to move or Auto-Attacks, which can be used to block attacks that would otherwise inflict Topple, Daze, Blowdown, or knockback effects to Reyn

Intermediate
The intermediate books are only found in shops for 6400 G
 * Bionis' Leg
 * Refugee Camp Shop
 * Colony 6
 * Shop 1

Advanced
Advanced art books are only available from enemy drops.

Fiora
Fiora's Guard Shift boost her block rate by 100% but reduce her physical attack by 25% as unlike Reyn, she is still able to move and attack.

Intermediate
The intermediate books are only found in shops for 19,600 G
 * Colony 6
 * Shop 9

Advanced
Advanced art books are only available from enemy drops.

Xenoblade Chronicles 2
Guard Shift restores Hugo's HP when he is attacked and also recharge his other arts. The art also damage the enemy unlike its past versions.