I was just wondering, in RtL, if Death Siphon would trigger before losing morale or after?

http://vignette1.wikia.nocookie.net/descent2e/images/1/1b/Battlemage_-_Death_Siphon.png/revision/latest?cb=20160921205238

Before. It explicitly triggers "before you are knocked out", so it would be before telling the app that a hero has been KO.