Reach I: Increases the range of long-range abilities by 2 meters while near a keep or outpost. Any ability with a range greater than 28 meters is affected.
Reach II: Increases the range of long-range abilities by 5 meters while near a keep or outpost. Any ability with a range greater than 28 meters is affected.
Reach increases the range of your distant attacks while near a keep in Cyrodiil.