Mostly based on Lumaterian's 'Impactful Backgrounds' approach, with some fixes and tweaks. Both of the mods sourced have open permissions, and so do this one. https://wryemusings.com/Cathedral%20vs.%20Parlor.html

Summary :

• Acolyte:
  

    - Proficiency in Religion
    - Long rests grant you Sanctuary permanently until you attack; (A copy of Way of the Open Hand's 'Tranquility' feature, this will not stack)

• Charlatan:
  

    - Proficiency in Deception
    - Can cast Disguise Self at will. Can cast Minor Illusion.

• Criminal:
  

    - Proficiency in Sleight of Hand
    - Hand Crossbow, Scimitar, Clubs, Greatclubs Proficiency

• Entertainer:
  

    - Expertise in Performance
    - Musical Instrument Proficiency

• Folk Hero:
  

    - Proficiency in Perception
    - Advantage on Saving Throws against being Frightened; (A copy of Halfling's 'Brave' feature)

• Guild Artisan:
  

    - Proficiency in Medicine
    - Chance to brew 2 potions at once if you succeed a DC 15 Medicine Check; (A copy of Transmutation School's 'Experimental Alchemy', this will not stack)

• Haunted One:
  

    - Proficiency in Intimidation
    - Haunted One's Revelry : When you score a Critical Hit, all nearby enemies must succeed a Constitution Saving Throw or suffer Bleeding for 2 turns.
    - Urge Incarnate : Once per long rest, when reduced to 0 Hit Points, you regain 2d4 Health Points. If you fail a Wisdom Save DC(12), you gain Madness for 1 turn.

The Haunted One background is unlocked for all player characters, not just Dark Urge.

• Noble:
  

    - Proficiency in Persuasion
    - When you roll a 1 on an Ability Check, the die is rerolled once; You must use the new roll, even if it is also a 1; (The Ability Check component of Halfling 'Luck', this will not stack)

• Outlander:
  

    - Proficiency in Survival
    - 1.5 meters extra Movement Speed; (A copy of Wood Elf's 'Fleet of Foot' feature, this will stack)

• Sage:
  

    - Expertise in Arcana
    - Spell Scribing of all Scrolls costs half as much; (The 'Savant' feature from all 8 Wizard subclasses, this will not stack)

• Soldier:
  

    - Proficiency in Athletics
    - When you roll a 1 on an Attack Roll, the die is rerolled once; You must use the new roll, even if it is also a 1; (The Attack Roll component of Halfling 'Luck', this will not stack)

• Urchin:
  

    - Proficiency in Stealth
    - Advantage on Insight checks


List of changes (from 'Impactful Backgrounds') :

• Renamed all passives background names & descriptions to fit more within the vanilla game :
  

- Fixed the Inspiration panel description bug from 'Impactful Backgrounds' (had to remove the tooltips from the character creation part.)
- New passive background names :
"Acolyte’s Sereneness"
"Charlatan’s Camouflage"
"Criminal’s Versatility"
"Entertainer’s Virtuosity"
"Folk Hero’s Awareness"
"Guild Artisan’s Craftiness"
"Haunted One’s Revelry"
"Noble’s Affluence"
"Outlander’s Alacrity"
"Sage’s Mastery"
"Soldier’s Training"
"Urchin’s Discernment"

• Modified all backgrounds to give Proficiency instead of Expertise :
  

- Reasoning : Expertise at level 1 was too strong for my tastes.
- Exceptions :
- 'Sage' background, who keeps 'Arcana' Expertise :
- Reasoning : the passive added (reducing scroll scribing by half) is thematic, but really niche. Having 'Arcana' Expertise adds a real value to picking 'Sage', especially when playing with a mod like 'Scroll Casting Revised' : https://www.nexusmods.com/baldursgate3/mods/10027
- 'Entertainer' background, who keeps 'Performance' Expertise :
- Reasoning : Bards, which are one of the best fit thematically for this background, already get 'Musical Instrument' Proficiency. I wanted them to still have something impactful.

• 'Haunted One' background :
  

- Changed VFX and condition for "Haunted One's Revelry" (previously "Haunted One - Bloody Execution") :
- Triggers on a Critical Hit only.
- Changed the VFX to a red one instead of the previously green 'Mortal Reminder' one that was used.
- Added the "Urge Incarnate" (Passive) from 'Dark Urge - Rebirth' https://www.nexusmods.com/baldursgate3/mods/14598 with rebalanced values :
- Works like the 'Relentless Endurance' passive from Half-Orcs, but restores a bit more health (2d4), and has a chance to trigger Madness for 1 turn on a failed Wisdom Saving Throw (DC12).

• 'Folk Hero' background :
  

- Modified from 'Persuasion' to 'Perception'

• 'Noble' background :
  

- Modified from 'Perception' to 'Persuasion'

• 'Guild Artisan' background :
  

- Modified from 'History' to 'Medicine'

• 'Charlatan' background :
  

- Added the 'Minor Illusion' cantrip as well.

• 'Criminal' background :
  

- Added Proficiency to 'Clubs' and 'Greatclubs' as well.
- Reasoning : Adds a bit of flavour; those fit thematically for criminal background Str alternatives to Dex weapons even if there's only 3 classes without 'Simple Weapons'.


Credits :

    - Lumaterian's Impactful Backgrounds
    - DaniAlbrtSancEs' Dark Urge - Rebirth