Perfect Block is a Defence perk in Kingdom Come: Deliverance. Not to be confused with Master Strike.
Description[]
You've learned to fend off the opponent's blow with a well-timed block. You'll know exactly when to block from the appearance of a green shield in the middle of the combat rose.
Effects[]
When locked onto an enemy, the center of the Combat Rose will turn into a green shield when the enemy attacks. If the player can press the Block key within this window of opportunity, Henry will preform the Perfect Block, which is functionally a Parry[1]. This will deflect the enemy's strike, and can then be followed up with a button input to attack. This would be a Riposte[2]. The duration of the window of opportunity will increase as skills increase.
If one activates the prompt early enough, Henry may instead preform a Master Strike, and automatically land an unblockable, undodgeable attack without the need for another input. This technique is slightly different than a Perfect Block, and is not unlocked at the same time.
Acquisition[]
This perk, along with Perfect Block, can be acquired by training with Captain Bernard at the beginning of the game.