Bladesinger's Study (5e Feat)
From D&D Wiki
Prerequisites: Intelligence 16 or higher
Studying with Bladesingers has given you insider knowledge of how they maneuver and co-ordinate their attacks.
- You gain proficiency with longswords, shortswords, and rapiers if you are not already proficient.
- You can use intelligence instead of strength or dexterity for the attack and damage rolls of your melee weapons.