Signature Spells
At 1st level and each time a spell specialist gains a new spell level, she chooses a signature spell. The spell specialist can cast this spell without preparing it, in the same way a sorcerer casts spells spontaneously. Even though the spell specialist does not need to prepare this spell, it still counts against the Archetypes 2 number of spells she can prepare, reducing the number of spells of each level she can prepare each day by 1. A spell specialist can swap out a single signature spell for another spell of the same level when gaining a class level.
The DC for signature spells increases by 1. The spell specialist gains a +2 bonus on concentration checks when casting signature spells; this bonus increases to +4 at 10th level. Additionally, a spell specialist can apply one of the following additional effects by spending 1 point from her arcane reservoir.