Casting Returning in communion

[shard]

I've made several attempts to have a communion master cast returning now; none of which were successfully achieved. I'm quite sure I have the gem and path requirements; and I don't think the master's fatigue was an issue. Are there any other limitations I might have missed?

[Endoperez]

Mages may decide not to use gems if the opposition is so weak that the AI thinks it can win without using gems.

[Sir_Dr_D]

In relation to the returning spell, what happens when it is cast during an assasination attempt?

[ano]

Mage is returned home as expected. It is a good way to live under Astral Corruption, btw.

[K]

I've never had a mage not cast Returning during an assassination attempt when scripyted to do so.

It actually the premier way to avoid Horrors if you use Contracts or Lightless Lanterns.