I know someone here can help me out, i've scoured the internet looking for information in regards to what exactly is the dark force in the marvel universe? I know that it's limbo-ey, adn used for teleportation, and i know that it had some sort of correlation with Cloak being sort of an energy vampire...

come on, experts, what's the story with the Dark force?

All help is greatly appreciated

DarkForce is form of energy that comes from the Dark Dimension. The Dark Dimension is ruled by Dormammu. If someone enters the Dark Dimension that person will start to slowly lose his/her LightForce that is the energy that comes from every living thing in our dimension. Likewise any being from the Dark Dimension that enter our dimension will start to slowly die. Cloak is a being that can live in both dimensions and his teleport power consist in traveling in the Dark Dimension and reapiring in another point of our dimension. Dagger cab manipulate the Light Force generated by our dimension in form of light daggers.

thanks, sanga man.

so cloak beame some sort of vampire, right?

Well, yes, in fact if he don't consume some of the light (provided by his partner Dagger) in a given time the hunger from living light become so strong that he has to take it from any living thing near him, friend or foe.