/invis is a 1 shot broadcasted command (below) to cause your boxes to cast their aa group invis.

Options

group	your current ingame group (default no option)
zone	every box you have in the zone
all	all boxes across all zones running Entropy
raid	all your boxes in the current raid

notes

Invis Vs. Undead
Cleric, Shadow Knight, Necromancer, Paladin

Invisibility
Wizard, Magician, Enchanter, Shaman, Ranger, Druid

The classes will cast whatever they have set in their /chr invis settings.