“The Slayer walks the earth! With a successful Luck roll, all of your hits in hand-to-hand combat are upgraded to critical hits - causing destruction and mayhem.”
When completely bare-handed (no weapon equipped), swings will still be at a normal speed and unaffected by this perk.
This perk does not affect Action Point costs. However, the increased speed does make V.A.T.S. attacks execute faster, thus reducing the amount of time that the Courier is "locked" in V.A.T.S. sequences where they are left vulnerable.
The benefit of this perk can be utilized even more with the consumption of rushing water, offering a combination of +80% Melee/Unarmed attack speed.
The slayer walks the Wasteland! When using unarmed attacks, your successful attack rolls are increased by 30 for purposes of determining critical hit results.