Line of Sight: A Line of Sight effect persists as long as the caster and the target could potentially see each other. If you can draw a straight line between the caster and the target without the line being obscured by any obstacles, then the Line of Sight is still in effect.

The caster or target cannot close their eyes or hide behind another creature to break Line of Sight; they must impose some physical barrier, such as a building or large tree, between them to break it. If the caster or target breaks Line of Sight for longer than five seconds, the effect is broken; if Line of Sight per the rules above is reestablished before the five seconds is up, then the effect continues.

Line of Sight effects end immediately if the caster loses access to Game Abilities.