Patch 3.23

[Jazzepi]

Reverse communions are where you have all the master(s) at the very bottom of the command list. All they do is cast magic path buff spells that the slaves get for free. Sometimes you even cast stuff like astral shield, body ethereal, personal luck, etc, to make the mages good against troops. Good being a relative term.

But, that's the idea. You just abuse the fact that the slaves get the master's self-buffs cast on them for free.

Jazzepi