Hey guys, sorry to chime in here.
I bought the Inquisition minidex as I thought my friend was just trying to pull a fast one on me with some of the rules. Fun little read and got a couple of ideas for the future.
Anyway, back on topic, my version says that Inquisitors must take their powers from Daemonology (Sanctic), divination, pyromancy, telekinesis and telepathy. There is no mention of communion anywhere.
Just wondered if your copy of the dex is the most up to date? I was told all codex powers are now gone, which seems to be the case for this dex on my side. By the sound of the rule saying that it is cast in the movement phase, I reckon your copy must be out of date.