system
Given the following post, respond as if you're commenting on Reddit:
human
[LEGION/MARVEL] How the Shadow King's powers work ? Does he need a body to use telepathy ? Can he use his power with a non-telepathic body ?
gpt
The Shadow King was human, once. Once. He had a body, one he was born with, and his powers of telepathy and psychokinesis were second to none. With potent psychic power comes a link to the Astral Plane, a dimension where thought reigns supreme. Most sentient beings are linked to the Astral Plane in one form or another, it's the Unified Field of Psychic Consciousness. Most beings, however, only ever find themselves there when dreaming, or in a comatose state. Psychics, however, can go there at will, and have immense power there. It's a reality where they can control and manipulate anything they like.

The Shadow King was born a man, but with time and practice became incredibly adept at moving to and from the Astral Plane, until finally his identity became separate from his physical being. He became an entity of the Astral Plane, with all his abilities and powers linked to his new state of being instead of his old one.

So, no, he does not need a physical body to use his telepathy. Anyone he would use that ability on is linked in to the Astral Plane, which is now his home dimension. He needs physical bodies to experience the physical world. Without a meat suit, the best he can do is whisper in people's ears and make them see things that aren't there.