Square Enix is looking for eager Final Fantasy XIV players to help them test the upcoming World Visit system once it goes live. The test is designed to stress test servers in preparation for the launch of the Shadowbringers expansion. Players are asked to join the "large-scale FATE "A Horse Outside" [that] will spawn at specific times". There will be a system wide announcement when the FATE has spawned so players can join up.
The World Visit system is set to launch with Patch 4.57.