While near her Oathsworn ally, Kalista gains 9% (+1% per level) bonus attack speed.
Active: Kalista commands a soul sentinel to the target location within range, gaining sight in a ~450-length cone in front of it. The sentinel's sight is obstructed by terrain and brush. Upon reaching the target location, it will return to a point within ~1400 units of cast location. The sentinel will perform a total of 3 laps, including the first two lengths. The sentinel is vulnerable from behind and will die if attacked twice by an enemy champion or once by a tower. If the sentinel spots an enemy champion it will scream and stalk them for the next 4 seconds, revealing them for the duration.
Kalista stores a charge of Sentinel every 90 / 80 / 70 / 60 / 50 seconds, and can store up to 2 charges.