Tales of the Valiant Players Guide (pg. 127)
Prerequisite: Ability to Cast One or More Cantrips
When a creature you can see damages you with a spell, you can use your reaction to cast a cantrip targeting that creature. In addition, when you cast a spell that requires an attack roll, you gain these benefits:
• Double the range of the spell. If the spell’s range is touch, its range increases to 15 feet.
• The spell ignores any AC bonus granted by cover.