How Are Spell Slots Determined?

A spell slot is a variable of a class’s spellcasting that determines how many spells of a given level a character can cast per day. A spell slot is like a container that can hold a specific level of spell.

When a character casts a spell, the spell goes into the character’s spell slots for that particular level. The number of spells per day that a character can cast is determined by the number of spell slots he or she has.

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The number of spell slots available to a character depends on two factors: the character’s class and the character’s level. A character gets more spell slots as he or she gains levels, and the number of slots increases as the character’s class level increases.

For example, a 1st-level wizard has two 1st-level spell slots, while a 2nd-level wizard has three 1st-level spell slots and one 2nd-level slot.

A character can never have more than one type of spell in a given slot. For example, if a 1st-level wizard has already used his 1st-level slot for magic missile, he can’t use it again for another 1st-level spell until he rests and recovers all his expended spell slots.

Some classes (such as the druid) have spells that require two or more slots to cast. These are called “meta-magic” spells.

Meta-magic spells take up more than one slot because they are more powerful than regular spells.