Soul Eaters

Soul Eaters are an alien species.

Traits
They tend to feed of memories at first and the process of extracting memories depends on how long the person clings to their memories. The longer they hold on the longer they keep their memories. The next stage after the extraction of your memories is they tend to eat your skin and flesh. They will continue this until you die.

Appearence
When they reveal themselves they are a creature shrowded in darkness and have the appearence of a long overhanging black cloth on them. Also if there is an area in a room that is even partly darker than the rest then you know they are there.

Home
Not much is known about where they come from but it is rumoured that they were created during the Time War by the Daleks for use against the Time Lords. They managed to breakthrough the sky trenches and kill Time Lords. They then spread throughout the universe but are mainly in darker places, normally buildings or houses that are populated.