Level (Spell Descriptor)
The next line of a spell description gives the spell’s level, a number between 0 and 9 that defines the spell’s relative power. This number is preceded by an abbreviation for the class whose members can cast the spell. The Level entry also indicates whether a spell is a domain spell and, if so, what its domain and its level as a domain spell are. A spell’s level affects the DC for any save allowed against the effect.