| SirShua |
One I used on my party's skittermander I called prey's curse:
While you are threatened by any enemy or ally one size larger than you, you are shaken. The penalty from this shaken increases by 1 for each additional category larger.
Taking damage from such a creature causes you to be frightened for until the end of your next turn.
I had one that dealt strength damage on a successful melee attack ready, but the guy missed and never got another chance to use it.