Murderous
Effect:
Against staggered enemies, your crit range with rogue attacks expands by 2.
Adventurer Feat:
You gain a +2 attack bonus against staggered enemies.
Champion Feat:
Your crit range against staggered enemies expands by 2 (now +4).
Epic Feat:
Whenever a staggered enemy misses you with a melee attack, it's vulnerable to your attacks for the rest of the battle.