You have developped a companionship to an invisible shadow named Bob (or something else). Bob helps you out if you're friendly enough to him, or if you intimidate him well enough. Either way he gives you the following benefits:

• Your charisma score increases by one
• When you are not in bright light, you can use your shadow to move. This increases your speed by 10 feet and allows you to ignore difficult terrain and hoover up to 1 feet in the air above surfaces such as water, ice and caltrops. You can do this a number of minutes per long rest equal to your charisma modifier (minimum of 1).
• You can as an action attempt a DC 15 charisma check to manipulate shadows within 10 feet of you. On a success, you can manifest 1d6 shadows that last for 1 minute. The shadows can't influence the world in any physical way, but they can dim the lighting in an area and form intricate patterns and shapes. The only way the shadows can be percieved is via regular sight and truesight.