Throughout the Sword of Truth series, we see Richard Cypher/Rahl/Amnell draw his own blood from his forearm before using the Sword of Truth, typically followed by the phrase "Blade be true this day."
Did Richard actually gain something this?
Did it help activate the magic of the sword, or was it just part of the way he mentally focused himself?
I've read the series several times, but I can't recall if it were ever explained in any detail outside of it being one of Richard's idiosyncrasies.
Bonus: Is there any hint or evidence that other Seekers or War Wizards engaged in this practice with their swords?