You are well-versed in being able to use weapons effectively - you gain the following benefits.

• Increase your Strength or Dexterity score by 1, to a maximum of 20.
• You gain advantage on attacks of opportunity.
• Damage rolls made with martial weapons are made using dice 1 size higher than normal. For example, if you were to make a damage roll with a Longsword, you would roll 1d10 for a one-handed attack, or 1d12 with a two-handed attack, instead of the normal damage dice.