Mystic: Mystic Spellcasting
Grants spell casting using the Cast a Spell activity, starting with three 1st-rank spell slots daily that scale with level. Wisdom is your key attribute for spell attack modifiers...
You are a spellcaster and can cast spells using the Cast a Spell activity. As a Mystic, when you cast spells, you might intone a prayer or hum a song inspired by your epiphanies, you might gesture or dance in patterns that follow the flow of your connection's network, and you might accompany your spellcasting with wisps of energy flowing between you and your bonded allies.
Each day, you can cast up to three 1st-rank spells. You must know spells to cast them, and you learn them via the spell repertoire class feature. The number of spells you can cast each day is called your spell slots.
As you increase in level as a mystic, your number of spells per day increases, as does the highest rank of spells you can cast, as shown on the Mystic Spells per Day table.
Some of your spells require you to attempt a spell attack to see how effective they are or have your enemies roll against your spell DC (typically by attempting a saving throw). Since your key attribute is Wisdom, your spell attack modifiers and spell DCs use your Wisdom modifier.