Talented scholars who know how to access magic normally beyond their reach, Spell Stealers are talented at just that, taking spells from various different practices.
Spell Training
At 1st level the Spell Stealer learns a select group of spells equal to ½ their Magic + 1 (minimum of 1). They cast spells like a Mage, even when using spells from different types of magic and count their spells as arcane magic for the purposes of provoking attacks of opportunity and for any effects relating to magic types.
At 4th level and every 3 levels thereafter they choose an additional spell of a level they’d be able to cast as a Mage of their level, and add it to the spells they know.
Spell Stealers have a base amount of MP equal to that of a Mage of their level, and add ½ Resistance to their total MP rather than full Resistance.
This replaces Finesse Training.