"You can repel an attack if you parry with your shield at the right time. Strike back in the opening you create."
Ta'loh Naeg

Perfect Guard is a technique from The Legend of Zelda: Breath of the Wild. Link can perform this skill just before an enemy attack hits him. During a short moment, the enemy will be stumbled and Link can counter-attack. A Perfect Guard also protects the shield from wearing down, assuming Link had timed the maneuver correctly. The time window that allows Link to successfully pull off a Perfect Guard depends on factors such as the speed of the incoming attack, the range, what type of attack it is, and so on.

This skill is effective against Guardians, as Link can reflect the laser to deal significant damage to them. In the case of the stationary Decayed Guardians, it instantly kills them. If pulled off too late or too early in this instance, it will leave Link wide open for the Guardian's beam. However, there is no need to use the Perfect Guard in that instance assuming Link wields an Ancient Shield and has it ready to reflect the beam.

See also