Hypotheticals of the Storm #5: What would be the most broken ability if it had global range?

Title. By global range I mean global casting range, the ability's hitbox doesn't change unless the ability is a straight line, in which case it is extended infinitely (so for example, Deathwing's flight R's hitbox would be affected, but his AOE fear wouldn't). If the ability is a projectile with speed, the speed would stay the same and wouldn't be changed (similar to how global Azmo's Q currently works, where the projectile would take longer to reach the farther you throw it). What do you think the most broken ability would be?