Sap of Nightmares does not work.

The struggle is real, Please fix this asap Im running out of mana and not leeching at all with my chaos damage. I am using original sin ring.

Both mana and life seems to be bugged as well.

there is no [mana]and [hp] leeching by " spell" damage. it can only leech by doing "physical" damage by supporting "attack" skill.
and the passive means that, if you got a physical [attack] mana leeching, it can be treated as chaos [attack] damage leeching

Ah, and here I thought I was doing something wrong.

I don't have original sin, but I do quite a bit of chaos damage but it isn't leeching at all.

I play on monk and my lich doesn't work on hp, but it works on mana.

Not sure if it’s intended, though not being able to leech off spells is such a bummer and it limits the node to those who use attacks only

Really doesnt seem to work which is very bad, no one int he wording saying chaos damage from physical attacks should also work fro spells, it has been already very challenging doing anthing with chaluya then this :/ really makes me wanna give up.