For public knowledge, the G11 chest contains Excavation, but it requires 6 keys to be opened.
The V11 chest contains Sonder, but how does it open? I guess it has to do something with switches, but does anyone know for sure? Based on the map page, there is only 1 switch left to be found.
EDIT: Team Red votes for shorter phases if possible. Either that, or something else to speed things up a bit.