When falling from great heights, you benefit from the following effects:

Reduces the Stagger duration by 75 percent.
Suppresses Grunts of Exertion from falling.
Upon landing, break into a sprint at 150 percent of your normal Running Movement speed for 3 seconds.
Balanced Landing causes the Exhausted Status Effect for 60/50/40 seconds.
Balanced Landing cannot be used when Exhausted.

Grants 3 additional Self-Unhook attempts.
Increases the Self-Unhook chance by 2/3/4 percent.

Increases your Repair speed by +15 percent for each other Survivor within 4 metres of your location, up to a maximum of +45 percent.
This effect is also applied to all other Survivors within that range.
Grants 50/75/100 percent bonus Bloodpoints for Co-operative actions.
Survivors can only be affected by one instance of Prove Thyself at a time.

While repairing Generators, complete 5/4/3 Good or Great Skill Checks to activate Rookie Spirit for the remainder of the Trial:

Once active, the Auras of any regressing Generators are revealed to you.