Black Lore Sentinel Ability:
Sinister Revelations: As a standard action, the sentinel can tap into the mind of an enemy within thirty feet that she has line of sight to. The opponent must succeed on a DC 10 + class level + Int modifier Will save or become staggered for one round as the sentinel gains the benefit of learning a mental weakness of the opponent. Within the next three rounds, the sentinel can use another standard action against the opponent to turn that glimpse of weakness into a mental assault. The enemy must succeed on a DC 15 + class level + Int modifier Will save or fall victim to one of the following effects:
Denial: The opponent is blinded and deafened for three rounds.
Guilt: For three rounds, the opponent must succeed against the original Will save DC or take only a move action for that round.
Anger: The opponent is compelled to kill its allies for three rounds.
Sadness: The opponent takes 2d6 nonlethal damage and 1 Charisma damage each round for three rounds.
Defeat: Within the next three rounds, the sentinel can apply a -4 bonus to three rolls the victim makes.
Check out the Gruumsh's Fist, Foot, and Other Fist abilities. I'm thinking maybe Other Fist replaces Fist by making him permanently one size larger.