Stock Cairn Wraith:
I didn't keep very much; I think only the body.
The scythe is a warstaff bottom half, and the top half is some Eldar... thing from my grab bag pile, as well as a Dark Eldar knife.
The head is a pilot from that flying Necron Lord chariot (I built mine without the pilots). The tail is from, I want to say, a Triarch Stalker box maybe. The tail is another Dark Eldar knife. The tendrils are green stuff run through the Green Stuff Industries tentacle maker, and the blades on the end are again
DE knives.
Sorry some of the details on the conversion are fuzzy, I built this a few years ago and then shelved it unpainted as is my wont. Although the paint job is pretty not great I think the blending is alright. I might hit it will dullcote again, there are definitely some shiny spots here and there which I didn't see until resizing the photos.