Spellcasters don’t just “know spells” — they manage **what they have ready** and **how they cast them**.
Two rules control this:
- **Spell Preparation**
- **Ritual Casting**
#### The Core Rule (Read This First)
> **Some spells must be prepared to use.
> Some spells can be cast slowly without using spell slots.**
Spell preparation is choosing which spells you have **ready to cast today**.
#### Who Prepares Spells?
Some classes **prepare spells** each day:
- Clerics
- Druids
- Paladins
- Wizards
Other classes **know spells permanently**:
- Bards
- Sorcerers
- Warlocks
- Rangers (usually)
Note: If your class prepares spells, this section applies to you.
#### How Spell Preparation Works
After a **long rest**, you choose a number of spells to prepare.
Prepared spells:
- Can be cast using spell slots
- Can be changed later (after another long rest)
Unprepared spells:
- Cannot be cast, even if you know them
##### How Many Spells Can You Prepare?
This depends on your class, but usually:
> **Spellcasting Ability Modifier + Class Level**
Example:
- Level 3 cleric
- Wisdom modifier +3
➡ Can prepare **6 spells**
Note: Cantrips do **not** count toward this limit.
#### 📕 Wizards (Special Case)
Wizards:
- Have a **spellbook**
- Can only prepare spells **written in it**
- Can add more spells by copying them
Spellbook = library
Prepared spells = what you memorised today
#### Changing Prepared Spells
You can change your prepared spells:
- After finishing a **long rest**
- Not during combat
- Not mid-adventure (unless the DM allows it)
#### Ritual Casting
Some spells can be cast **as rituals**.
This means:
- No spell slot is used
- The spell takes **10 minutes longer** to cast
#### The Core Rule
> **Ritual spells trade time for spell slots.**
#### How Ritual Casting Works
To cast a spell as a ritual:
- The spell must have the **Ritual** tag
- You must have the spell available (rules vary by class)
- You add **10 minutes** to the casting time
- You do **not** spend a spell slot
#### Who Can Cast Rituals?
- Clerics & Druids: must have the spell **prepared**
- Wizards: must have the spell **in their spellbook**
- Bards: must **know** the spell
Note: Warlocks can only ritual cast if they have a specific feature.
#### When Ritual Casting Makes Sense
Ritual casting is great when:
- You aren’t under time pressure
- You want to save spell slots
- You’re exploring or investigating
Common ritual spells:
- _Detect Magic_
- _Identify_
- _Comprehend Languages_
- _Alarm_
#### When You Can’t Use Rituals
You can’t ritual cast if:
- You’re in combat
- You’re being chased
- Time matters immediately
- The spell doesn’t have the Ritual tag
#### Spell Preparation vs Ritual Casting (Quick Comparison)
|Concept|Purpose|
|---|---|
|Spell Preparation|Limits what spells you can cast today|
|Ritual Casting|Saves spell slots by taking extra time|
#### DM Rule of Thumb
> **If time is tight, rituals aren’t an option.
> If time is free, rituals reward planning.
#### Summary
> **Prepared spells are what you can cast today.
> Rituals let you cast certain spells slowly without using slots.**