need help getting Life Transfer/and or the boss "Shadow of Death"

I need to find this boss to get life transfer off of it since even though it says I can get life transfer from the skill trainer in maguuma stade I can't.. doesn't appear on the list of available skills. So I searched through every part of the black curtain looking for this boss so I could steal the spel from it, it just wasn't there.. I know that most boss spawns are random but according to a npc in temple of ages it says that it's supposed to spawn in 'the darkest corner' so that makes me think that it isn't random...

any help would be greatly appreciated.

Shadow of Death is in the Black Curtain, down south near the zone lines to the cursed lands. However despite what this website states, he DOES NOT have Life Transfer, he uses Life Siphon. So don't waste your time looking any more, as I did.

Supposedly a boss in Iron Mines of Molandune has it, but I've been looking and can't find him. Gotta be something I'm missing, but haven't finished infusing so makes some parts kinda tricky.

life transfer can be found in "Ring of Fire"

you must go thru the front gate and kill the boss near the bridge.