Gift of the Broken Vessel

You patron has aided in the accomplishment of a great arcane feat, and as a result the soul it has assisted (chosen by your DM) has been touched irrevocably by its power, your patron now holds together this broken vessel. Your proximity to this soul can unlock power not intended for your world, through the invocation of your patron's will. 

As an action on your turn while within 100ft of the affected soul, you may call upon a divine transformation and return the soul to its true form for one minute. While the soul is transformed its consciousness is replaced by your patron's, and you may communicate with it telepathically according to the Find Familiar spell. When using your bonus action to command the soul, your patron will act out your wishes on the soul's normal initiative as long as they do not oppose your patron's goals. If no command is issued, your patron will use the vessel as it sees fit. Additionally, the souls' eyes are alighted with topaz light, and a creature with Truesight or 5 Madness counters can see a number of psychic tendrils puppetting the soul's true form. 

At the end of one minute, the soul is returned to its normal form. This feature may be used a number of times per day equal to your number of pact magic slots (but does not expend a spell slot).