BG3 Combat Guide for Beginners: Action Economy, Positioning & Winning Every Fight

The Action Economy: Your Most Important Resource

Every character in BG3 gets these resources per turn:

Resource	Icon	What You Can Do
Action	Green circle	Attack, cast most spells, Dash, Hide, Disengage, use item
Bonus Action	Orange triangle	Off-hand attack, Shove, Jump, drink potion, cast certain spells (Healing Word, Misty Step)
Movement	White bar	Move up to your speed (typically 9m/30ft)
Reaction	Purple diamond	Opportunity attacks, Shield spell, Counterspell — triggers on enemy turns

The Golden Rule: Use ALL available actions every turn. A Bonus Action left unused is wasted damage, positioning, or healing that could have helped you win.

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Understanding Attack Rolls, AC, and Damage

The Basic Formula

When you attack, the game calculates:

Attack Roll (d20) + Proficiency Bonus + Ability Modifier vs Target AC

If your roll equals or exceeds the target’s AC, you hit. Then roll damage.

Example: Level 1 Fighter with 17 STR attacks with a greatsword:

• Attack roll: d20 + 2 (proficiency) + 3 (STR mod) = d20 + 5
• Target AC: 13 (goblin)
• You hit on an 8+ (65% chance)
• Damage on hit: 2d6 + 3 = 10 average

Why You’re Missing

Check the combat log (hover over attack text in bottom-right). Common causes of missing:

1. Disadvantage — You’re blinded, frightened, poisoned, or attacking from long range with a ranged weapon
2. Low Ground — Ranged attacks from below the target get -2 penalty
3. Non-Proficiency — Using a weapon your class isn’t proficient with (red warning on equip screen)
4. High Enemy AC — Heavily armored foes need specific strategies (use saving throw spells instead)

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Advantage: The Single Best Mechanic to Learn

Advantage means you roll two d20s and take the higher result. This dramatically increases your hit chance and critical hit rate.

Hit Chance Comparison

Base Hit Chance	With Advantage	Improvement
50%	75%	+25%
65%	87.75%	+22.75%
80%	96%	+16%

How to Get Advantage (Easy Methods)

Method	Action Cost	Works For
Attack from hiding	Bonus Action (Cunning Action: Hide for Rogues)	All attacks
Enemy is Prone	Shove with Bonus Action (STR check)	Melee attacks within 3m
Reckless Attack (Barbarian)	Free (but enemies get Advantage vs you)	All melee attacks
Vow of Enmity (Vengeance Paladin)	Bonus Action	Vs one target
Faerie Fire (spell)	Action + Concentration	Vs all affected enemies
Guiding Bolt (spell)	Action	Next attack vs hit target
Blind enemy (Darkness, Blindness spell)	Varies	All attacks vs blinded enemy

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Positioning: The Silent Game-Winner

High Ground

Ranged attacks from high ground get +2 bonus to attack rolls. This is free accuracy.

• Before combat starts, ungroup your party (G key) and position archers on elevated terrain
• Press Shift to see enemy sight lines (red zones) — position outside them for surprise attacks

Doorways & Chokepoints

Narrow passages are your best friend:

• Position your tank in a doorway
• Enemies can only approach one at a time
• Cast area-damage spells (Cloud of Daggers, Spirit Guardians) in the doorway
• Enemies kill themselves trying to reach you

Surprise Rounds

If you attack from stealth (crouched, outside enemy vision cones), you trigger a Surprise round:

• All surprised enemies skip their first turn
• You get one free round of attacks before they can act
• Combine with high-damage opening attacks to eliminate priority targets before the fight starts

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Surface Effects & Environmental Combat

BG3’s combat engine is built around surfaces. Master these interactions:

Combo	Effect	Duration
Fire + Grease/Oil	Explosion + Burning ground (1d4 fire/turn)	2 turns
Water + Lightning	Electrified water (stuns, 1d8 lightning)	2 turns
Ice	Slippery surface (DEX save or fall Prone)	Permanent
Acid	-2 AC to enemies standing in it	2 turns
Darkness	Blinds creatures inside (cannot make ranged attacks)	10 turns

How to Create Surfaces as a Beginner

• Grease bottles — Throw them. Common loot in Act 1. Creates flammable grease surface.
• Water jugs — Throw them. Then cast a lightning cantrip for electrified water.
• Firebolt cantrip — Ignites grease, oil, and webs. Gale and most casters have this.
• Ice Knife spell — Creates an ice surface around the impact point.
• Alchemist’s Fire — Thrown item, creates burning surface.

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Crowd Control: Stop Enemies From Acting

Killing enemies is good. Preventing them from acting is better.

Control Method	What It Does	Best Source
Prone (Shove)	Enemy skips turn standing up (costs movement), melee attacks vs them have Advantage	Strength characters (Bonus Action Shove)
Hold Person	Paralysis — auto-crit on melee hits	Cleric, Wizard, Warlock
Command: Grovel	Enemy goes Prone, loses turn	Cleric, Paladin
Frightened	Disadvantage on attacks, can’t move closer	Menacing Attack (Fighter), spells
Sleep	Knocks out low-HP enemies (no save)	Wizard, Sorcerer, Bard
Tasha’s Hideous Laughter	Enemy falls Prone + Incapacitated	Wizard, Bard, Warlock

For beginners, focus on Shove and Grease. Both are available at level 1, require no spell slots, and the prone condition is extremely powerful.

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Focus Fire: Kill One Enemy at a Time

The single most common beginner mistake: spreading damage across multiple enemies.

Why focus fire wins:

• A dead enemy deals 0 damage per turn
• An enemy at 1 HP deals full damage per turn
• Killing one enemy reduces incoming damage immediately
• The action economy snowballs in your favor with each kill

Priority targeting order:

1. Enemy spellcasters (low HP, high damage output)
2. Enemy archers (can hit your backline from anywhere)
3. Enemy melee (can be kited and controlled)

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When to Use Consumables

New players hoard potions, scrolls, and grenades “for later.” Later is now.

Consumable	When to Use	Why
Healing Potion	When any character is below 50% HP	Bonus Action use keeps your turn productive
Speed Potion	Before boss fights	Extra action for 3 turns = game-winning
Scroll of Revivify	During combat if a companion dies	Don’t end the fight a party member down
Alchemist’s Fire / Acid Vial	Against grouped enemies	Area damage from throwables
Invisibility Potion	Scouting ahead or escaping bad fights	Positioning before combat
Elixirs (Hill Giant, Bloodlust)	Long rest morning	Last until next long rest

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Combat Checklist: Every Turn

Before ending each character’s turn, ask:

1. ✓ Did I use my Action? (Attack, cast spell, Dash to reach a priority target?)
2. ✓ Did I use my Bonus Action? (Shove, Jump, drink potion, off-hand attack?)
3. ✓ Am I on high ground for ranged attacks?
4. ✓ Can I kill something this turn (vs just damaging it)?
5. ✓ Is a teammate down? Use Help action (Action) or Healing Word (Bonus Action) to revive them