Dark Urge Idea

I have a idea for a mechanic to help players with the evil itch in dnd. To be more specific, it takes the dark urge from bg3 and makes it a playable version. Now the mechanics share the starting similarities but change as yoy advance. Your given a Embrace counter that goes up based on how you play. The more you embrace the (im just calling this the Embrace for now) the more darker abilities you get while harming your humanity. After reaching a certain embrace level, you roll a d10 (at the DM and players discretion) to get a new physical trait from scaled skin to antlers or horns to colored eyes or claws or something. As you advance you get abilities like +1 or +2 to your strength or Dexterity at the cost of disadvantage on all charisma rolls (except intimidation obviously). And once at the highest levels you get a manifest which is a monstrous form you become, this form changes based on how you use the embrace (if you hunt in groups and use embrace alot you'll get direwolf. If you ambush alot with embrace you'll get Ankheg or Grimlock. Im still working on progression details but the main idea is that this is a add on for role-playing, your slightly evil character, or just a edge lord PC or NPC if the dm is feeling Intrested. And this isn't a race, sub class, or class. Just a extra detail. And im working on making a good version of it.