Morai-Heg

Morai-Heg, the Crone is a High Elf and Eldar goddess. She's old. VERY fucking old. Yes, High Elves/Eldar do grow old. She's THE goddess of fate, whereas Lileath just deals with prophesy.

Warhammer Fantasy

Morai-Heg looks older than any Elf-dar will likely ever look however. She's essentially the Fates of the pantheon in one body (and with both eyes). She grants prophesy to the elves when other gods ask it, she gets to re-arrange the stars at her will (which is why astrological signs aren't bullshit in Warhammer. Quite the contrary, you really can predict when shit hits the fan if you stargaze and it's all thanks to Morai-Heg).

Unlike the other gods, Morai-Heg doesn't have a duality to her. Despite being a goddess of the underworld, she is not evil. She's full True Neutral. She only does things that benefit her, and every event will benefit her. All beings, both those born and divine, will end up owing her more than they can ever pay by the time they die, probably because she manipulated it to be that way and no doubt causing a chain of divines undoing each other's requested changes in a clusterfuck of manipulation. She has an army of banshees that she uses as hunting dogs, sniffing out where great deaths will occur and either seeking to prevent them or hasten them as she sees fit (so yeah, that 6 you were hoping to roll or that 1 that lost you the game might be her fault).

Ravens are her mortal worshipers more than mortals, as her only shrine is at the Gaen Vale where all female elf gods have representation. As a result, being cruel to a raven really is unlucky especially if you are an archer or gunner. Non-archers call this superstition, but elven archers impart the wisdom of befriending ravens to even the races of the Old World when they can.

40k Version

It's interesting that while Lileath managed to predict (although without knowing the details) Slaanesh's birth, Morai-Heg not only didn't know a single fucking thing about what was going to happen, but also did nothing to prevent it. Out of all the gods of the Eldar it's most likely that Tzeentch would have saved her (probably from trying to pay back one of the half a fucking million+ favors he'd have owed her from Fantasy since the two Warhammers share a multiverse with one Warp) but since we have the blanket statement that "no gods other than Khaine and Cegorach survived" then we have to assume that Morai-Heg wound up in Slaanesh's gut after a thorough multi-cock reaming. Then again Isha turned out alive so who knows. The only exciting bit about her in the fluff is the fact she had it off with Khaine, had a bunch of daughters the Banshees with him, who she then sent after him to drive him mad until he agreed to cut off her hand so she could drink her own blood to gain more knowledge. Yeah, she is a bit looney to say the least.