Shapeshifting: Astiroth can alter his from and appearance by altering his shadow.
Shadow scent: Astiroth can track and detect others through the realm of shadows.
Shadow blend: Astiroth can move and blend in with the shadows making him difficult to detect.
Shadow bond: Astiroths specialty. Astiroth is able to bond to another persons/demons shadow. This bolsters their existing abilities and aids in unlocking their dormant demonic heritage. Astiroth can also move and act independently although restricted by 10 meters of his bond.
Shadows sweet Embrace: A much stronger form of shadow bond, this significantly bolsters the abilities of the bonded figure as well as grants them Asiroths abilities as well molding that individual into a far more deadly collector than before. However, Astiroth can not act independently of his host and is completely reliant on them except in thought.
Weakness: As a shadow, holy light burns Asiroth far more than normal for a demon. Asiroth lacks physically, while still a demon who shouldn't be underestimated, he is weaker than the average demon. When bonded to a host, his fate is tied with theirs, if his host dies, so will he. While capable of blending with shadows, he is not undetectable. Those trained to do so will sense his malicious intent or could simple shine a light into the shadow he is hiding in
Backstory: Astiroth had no intention of being a collector. His weak nature made him less than a favorable pick at first. One day however, a collector couldn't find a partner to help with a certain debt. Asiroth was unsure of joining but decided to aid since it would have been his first taste of being a collector. While his abilities over the shadows made him useful, it was when the unexpected happened that made his abilities sought after. An encounter with three blessed humans made survival almost impossible. That was when Asiroth first used Shadows Sweet Embrace. The demons abilities were bolstered enough and A long with the collectors experience, they were barely able to escape. It was here after that Astiroth was discovered to make the perfect partner. His shadow bond made many demons far more successful than before and eventually, more and more collectors sought his aid.