Soul reaping triggering in ToA?

I haven't been in ToA for some time, but when I went there today with my SS necro, shortly after I appeared there, I had soul reaping add me 3x 8 energy. I've seen this happening in D'Alessio outpost, but there are the ghouls behind the gate. So how did it trigger in ToA? Not a big deal, I'm just wondering...

It could be a lot of things. Probably some guy who had leftover Ghost-in-the-boxes from Halloween triggering them. Those things triggered soul reaping...

Or, it could be the Avatars dying after some time of inactivity. I'm not sure, I don't play necromancers.