Malekith/Hooks

Changelings

He has faesight, and can see faerie miens.

Demons

He is not unfamiliar with the Abyss.

Mages

He has an occult library and is a store of occult lore.

Mortals

Goths need apply here, as do would be Occultists.

Shifters

Perhaps he's crossed paths with the Bubasti or Ceilican, once or twice.

Vampires

As a keeper of lore, he tries to remain outside the fray of sectarian politics, but sometimes there is no middle ground.

Wraiths

He trades in secrets.