Made this for Starfinder, but I think it fits in Eberron as well.
You are just that good. You can spend a hero point to make two checks instead of one as an action when you use a skill with which you are proficient. If you succeed at one check and fail at the other, you are considered to have succeeded. If you succeed both times, you can count it as two successes or one success with a value equal to three higher than the best check.