Talk:Guild Battles/@comment-173.57.195.205-20150301034855/@comment-3241231-20150301044350

Players in the Wall tower are given the choice to use a new power on their guildmates called "Swap". This power swaps the two players, and like other class powers, can only be used if both the caster and the target are not stunned.

Guilds are limited to a certain number of swaps depending on the level of their wall, but otherwise, they're unrestricted in when they can use the power, as long as they are in the correct gate and they aren't stunned.