Spells
Source: Advanced Player's Guide, p. 65
A witch casts arcane spells drawn from the witch spell list (see pages 70–71). A witch must choose and prepare her spells ahead of time.
To learn or cast a spell, a witch must have an Intelligence score equal to at least 10 + the spell level. The Difficulty Class for a saving throw against a witch’s spell is 10 + the spell level + the witch’s Intelligence modifier.
A witch can cast only a certain number of spells of each spell level per day. Her base daily spell allotment is given on Table 2–10. In addition, she receives bonus spells per day if she has a high Intelligence score (see Table 1–3 of the Pathfinder RPG Core Rulebook).
A witch may know any number of spells. She must choose and prepare her spells ahead of time by getting 8 hours of sleep and spending 1 hour communing with her familiar. While communing, the witch decides which spells to prepare.