Maybe I shouldn’t mention this, but I noticed that summoning bone fiend, shadow fiend, and/or the golem before a match begins will give you life force when it actually starts.
I thought they removed this?
Weirder still, I accidentally started a game as a mm after playing a power build, and forgot to change to mm traits, and I didn’t get the life force. The missing traits were: Flesh of the master, necro corruption, death nova, and vampiric presence. When I applied these traits and played another match I got the life force again. So apparently one or more of these is needed for it to work.