Tales of the Valiant Players Guide (pg. 127)
Prerequisite: Access to 2nd-Circle Spell Slots
Your focus on battlefield magic, both protective and destructive, grants you these benefits:
• When you or a creature within 10 feet of you takes damage, you can use your reaction to expend a spell slot of 2nd circle or higher. When you do, the creature either gains a number of temporary hit points or takes additional damage of the triggering type (your choice) equal to twice the circle of the expended spell slot.
• You learn one 1st-circle abjuration or evocation spell from any source spell list. When you cast that spell, you can choose to expend 2 hit dice instead of a spell slot to cast it at its lowest circle.
A character can have only one focus talent.