On your turn in combat, you can do **a small number of things**.
Understanding what you can do — and _when_ — is key to playing smoothly.
#### The Core Rule (Read This First)
> **On your turn, you usually get one Action, one possible Bonus Action, and movement.
> Reactions happen outside your turn.**
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#### Action (Your Main Thing)
An **Action** is the main thing you do on your turn.
##### Common Actions
- **Attack**
- **Cast a Spell**
- **Dash** (move extra distance)
- **Disengage** (move without opportunity attacks)
- **Dodge** (harder to hit)
- **Help** (give advantage)
- **Hide**
- **Use an Object**
- **Ready** (explained below)
You only get **one Action** per turn.
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#### Bonus Action
A **Bonus Action** is something quick.
Examples:
- Rogue’s Cunning Action
- Two-Weapon Fighting
- Certain spells (e.g. Misty Step)
You can only use **one Bonus Action per turn**.
#### Movement (Free, but Limited)
- You can move up to your speed
- You can split movement before and after actions
- Difficult terrain costs extra movement
Movement does **not** use your action.
#### Ready Action (Prepare Something)
The **Ready Action** lets you prepare to act **later in the round**.
##### How Ready Works
1. Use your **Action** to ready
2. Choose:
- **Trigger** (“If X happens…”)
- **Response** (“I do Y”)
3. When the trigger occurs, you use your **Reaction** to act
Example:
> “If the door opens, I shoot the first thing through it.”
Note: If the trigger never happens, the action is wasted.
#### Reactions (Out of Turn)
A **Reaction** is a quick response to something happening.
##### Key rules:
- You get **one Reaction per round**
- It resets at the start of your next turn
- Happens **outside your turn**
##### Common Reactions
- **Opportunity Attacks**
- **Counterspell**
- **Shield**
- Readied actions triggering
#### Casting Spells & Action Economy (Important!)
If you cast a spell as a **Bonus Action**:
- You **can’t cast another levelled spell** that turn
- You can still cast a **cantrip** with your action
Example:
- Misty Step (Bonus Action) ✅
- Fire Bolt (Action cantrip) ✅
- Fireball (Magic Action) ❌
#### How It All Fits Together (Example Turn)
> “I move behind the pillar,
> cast Fire Bolt as my Action,
> and use my Bonus Action to hide.”
Later:
> “When the enemy runs past me, I use my Reaction to make an opportunity attack.”
#### DM Rule of Thumb
> **If an ability says it uses an action type, it does — no substitutions.**
#### Summary
> **One action on your turn, bonus actions only if you have them, reactions happen outside your turn.**
#### Quick Reference
|Type|When|Limit|
|---|---|---|
|Action|Your turn|1|
|Bonus Action|Your turn|Only if you have one|
|Reaction|Outside turn|1 per round|
|Ready|Uses Action|Costs Reaction to trigger|