You could also place burrowed units (let's say Zerg Drones) for Player 9 at 64 different positions. Then when you want to teleport to a random position, you'd randomize 6 switches, and have these 6 triggers:


Then you'd just need to move the "teleport" location to "Zerg Drone owned by Player 9 at Anywhere".

This will result in the location being randomly centered on 1 of your 64 burrowed units.

To reset the system, you'd want to add a trigger that clears all 6 switches (or you could clear each one in its own "___ is set" trigger). Also, after moving the location at the end, you'd need to "Give all Zerg Drone owned by Player 10 at Anywhere to Player 9".

This system has the benefit of making the destination unpredictable, and the player cannot manipulate it to get a destination of their choice. Additionally, if two different players use their teleport ability at the same time, they'll both get a unique random destination, as opposed to a global method of randomization which would teleport both players to the same area.