Favorite Weapon (5e Feat)
From D&D Wiki
Prerequisites: 18 Strength or Dexterity
You can pick one type of two handed weapon (such as crossbows, greatswords, or mauls) and use it as if it weren't two handed.
If the weapon is ranged you must have a Dexterity score of 18. If the weapon is melee you must have a Strength score of 18.