Here is what it's supposed to be, not sure if it's implemented in TOEE: Granted Power: You can perform a feat of strength as a supernatural ability. You gain an enhancement bonus to Strength equal to your cleric level. Activating the power is a free action, the power lasts 1 round, and it is usable once per day. Does your cleric have the Strength Domain?
One of my clerics had that as well- always wondered what it did. Wonder now many other cleric abilities actually work, as in clerics with elemental domains being able to turn creatures of that element?
Haven't you ever used your cleric of Obad Hai with air domain access to recruit all the kapoacinths (aquatic gargoyles) in the water node?