Deadly (Quality)

When you use this weapon to deliver a coup de grace, it gains a +4 weapon bonus to damage when calculating the DC of the Fortitude saving throw to see whether the target of the coup de grace dies from the attack. The weapon bonus is also added to the actual base damage of the coup de grace attack, and as base damage, is multiplied at 8th, 15th, 22nd, and 29th levels when used by a high-level wielder.