Relentless α
• Prereq: Strength 10+
The most furious fighters put everything they have into their blows.
When the character successfully uses the AllOut Attack option in melee, he can spend 3 
to add an extra 
to the damage. This stacks with the usual bonus damage from Good and Outstanding results. The warrior must have the available to spend or the ability doesn’t function.
Prowess
Prowess is a general category that can be taken by any character from any cosm. It focuses primarily on Perks that can be used in combat.
From Core Rules