General Gameplay Goals

The overall goal with this class was to create a support class/healer that has a 'button to click' every turn.  My favorite thing to do in MMOs/DnD is heal, and unfortunately this is an option that is often lacking in games.  I like using skills and having choices, but often felt in BG3 that using a spell slot was like using potions in Skyrim or elixers in Final Fantasy -  I hoarded them even though there was no reason too!

------------------Now with controller support thanks to mrdustm4n!---------------------------------------

Gameplay

All spells the Priest learns are cantrips, and this class utilizes a new resource called Holy Power to cast more powerful spells.  Holy Power is gained by Long Resting or casting spells which generate Holy Power, and is initially capped at 5 and later increases to 10.  You keep Holy Power between fights.  Spells are learned at fixed levels and gain power by learning increased Ranks (Heal, Rank 1 -> Heal, Rank 2 -> etc.), and many scale with Wisdom.

This is a support class!  While the Priest can deal a good amount of damage, it excels at support.  This generally means healing, shielding, fearing enemies or providing allies additional actions instead of directly dealing damage.  Pairs well with the Warrior Class and WoW Pally!

-----------------------------Priest 2.0 Updates-----------------------------

Now requires Script Extender!

Priest has some pretty massive changes! Following my latest class mod, WoW Pally I made a 'talent tree' of passives instead of subclasses.  So no more dedicated Shadow or Holy Priest, but there are  Holy/Shadow/Disc talents!

Every other level you will have a choice of 3 passives, generally split between Disc/Holy/Shadow.  The Level 12 passive is still Angelic Form and Shadow Form, but now there is also Apotheosis! Sadly no more cool subclass icons, but you will now get to choose your own path.

Classic Priest will still have an optional file on Nexus, but no more work will be done (maybe some bug fixes if they are really bad).  If you prefer the old version feel free the continue with that!   See Articles for the description.

IMPORTANT: If you are updating to Priest 2.0  with a character who is currently a Priest, you will need to respec to another class before installing, then respec back into Priest!  Installing Priest 2.0 while a character is a Classic Priest WILL crash the game.

Gameplay 

Gameplay is still pretty similar, with the goal of pushing some kind of button each turn.  Each turn you should try to generate enough Holy Power to cast larger spells next turn!  Most Holy Power generators are bonus actions so you will be able to generate at least 2 Holy Power each turn.  However with Priest 2.0 there are some significant changes!  
You can choose Holy talents and become a supreme healer who has tons of Holy Power to pop out heals, or learn towards Shadow dealing extra damage to debuffed enemies, or take advantage of Discipline and change the way your spells and casting works!

Talents

Every even level you will be able to choose one of the choices below:
Level 2
Inspiration - Get a new version of Power Word: Shield that will grant +1 AC while active
Binding Heal - Heal yourself for half your Priest level whenever you heal
Life Leech - Heal yourself for 20% of damage done

Level 4
Inner Focus - Gain Inner Focus: Cost 5 Holy Power - the next spell you cast does not cost any resources or actions
Closer to the Light - Whenever you gain Holy Power, gain 1 more
Shadow Mastery - Shadow Word: Pain now last until the target dies,  and Shadow Word: Death no longer hurts you

Level 6
Pain Suppression - Gain Pain Suppression: Costs 5 Holy Power (no actions), decrease the damage an ally takes by 50% for 2 turns
Mindful Aid - Add your Wisdom modifier to heals done
Mindless Destruction - Add your Wisdom modifier to damage done

Atonement is granted at Level 6 to all Priests!  You heal all party members for 10% of the damage you deal. 
NOTE: This healing isn't reflected in the combat log or above your head because of Script Extender things

Level 8
Light, Shadow, and Balance - You may now target two targets with Renew, Shadow Word: Pain, and Power Word: Shield
Surge of Light - You have a 25% chance whenever you cast a spell to gain a free cast of Smite
Torment - You deal 50% more damage to targets with Shadow Word: Pain 

Level 10
Max Power - You can target 2 targets with Power Infusion but it no longer affects you.
Rapture - Once per turn, gain an action when Power Word: Shield ends (either due to turns or damage)
Vampiric Touch - Unlocks the Spell Vampiric Touch - once per turn, when an enemy affected by Vampiric Touch is killed, gain an Action Point.  Also applies the effects of Shadow Word: Pain.

Level 12
Apotheosis - Enter a divine state, granting a free cast of Smite, Holy Fire, Penance, Power Word: Shield, or Purify at the start of each turn. Smite and Holy Fire deal 50% more damage
Angelic Form - Your connection to the Light is supreme, granting you an Aura of Light that heals all allies for 10% of your maximum HP,  generates 3 Holy Power per turn, and grants an extra Bonus Action.
Shadowform - You channel directly from the Shadow, allowing it to consume you.  You add your wisdom modifier to non-periodic Shadow spells, you are granted 2 Holy Power whenever you kill an enemy, deal 10% of your Max HP in damage to all foes around you, and gain 2 damage reduction.

Spells 

Holy Power Generators

 
Each Holy Power generator generates 1 Holy Power when cast, and can only be cast while in combat.

Smite - Action - Deals radiant damage 
Power Word: Shield - Bonus Action - Gives an ally temporary HP equal to the double your wisdom modifier for 10 turns.
Lesser Heal - Bonus Action - Heals a target
Renew - Bonus Action - Heals a target for the double your wisdom modifier each turn for 3 turns
Shadow Word: Pain - Bonus Action - Deals necrotic damage to a target each turn for 3 turns
Shadow Word: Death - Action - Deals necrotic damage to the target, if the target has more than 50% HP damages you as well
Vampiric Touch - Bonus Action - Applies Vampiric Touch and Shadow Word: Pain for 10 turns.  Once per turn, when an enemy affected by Vampiric Touch is killed, gain an Action Point. (Gained through a passive).

Holy Power Consumers

Some spells cost Holy Power to cast

Holy Fire - Action - 1 Holy Power- Deals radiant damage to a target and then fire damage each turn for 3 turns.
Heal - Action - 1 Holy Power - Heals a target for die roll + Priest Class Level.
Guardian Spirit - Action - 5 Holy Power - Place a buff on an ally, when that ally reaches 0 HP they will be healed to full instead.
Circle of Healing - Action - 4 Holy Power - Heal allies in a radius at target location
Prayer of Mending - Bonus Action - 3 Holy Power - Heals an ally for die roll plus Priest Class Level next time they take damage
Purify - Bonus Action - 2 Holy Power - Remove most negative effects from an ally
Mind Blast - Action - 2 Holy Power - Deals psychic damage and may fear an enemy for 2 turns
Void Blast - Action - 3 Holy Power - Deals necrotic damage and will fear a group of enemies for 1 turn
Mind Flay - Action - 4 Holy Power - Deal psychic damage and slow an enemy, concentration spell which will allow you to recast for an action on the same enemy for 10 turns. 
Penance - Action - 2 Holy Power - Hurls 3 balls of light dealing radiant damage to an enemy or healing an ally.
Power Infusion - Action - 5 Holy Power - Infuse you and an ally with power, giving each of you an extra action on the next turn.
Power Word: Barrier - Action - 3 Holy Power - Place a ring of light on the ground for 3 turns which gives allies +1 AC and +2 to all stats while they are within the effect
Inner Focus - 5 Holy Power - The next spell you cast does not cost an action or Holy Power (Gained through a passive)
Pain Suppression: 5 Holy Power - decrease the damage an ally takes by 50% for 2 turns (Gained through a passive)

Other
Power Word: Fortitude - Action - Gain +2/4/6 constitution until next long rest.
Bonus as an Action - Toggle - This is a class action that will allow you to cast any Priest Bonus Action spell as an action.  Toggle on to make bonus action Priest spells cost an Action point, toggle off to return them to a Bonus Action cost.  

Notes

1)  After level 12 you will be able to take the passives you did not select (you will need another mod to unlock levels 13-20)
2)  Rapture, Vampiric Touch, Power Infusion, and Apotheosis may be overtuned 

Install

Install the .zip or .pak using Baldur's Gate 3 Mod Manager

Baldur's Gate 3 Mod Fixer
Baldur's Gate 3 Script Extender
Improved UI + Improved UI Assets