Dragon Slayer Rapier

You gain a +1 bonus to attack rolls and damage rolls made with this magic weapon.

The weapon deals an extra 3d6 damage of the weapon's type if the target is a Dragon.

Vex (Mastery): If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.

Finesse: When making an attack with a Finesse weapon, use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Proficiency: martial, rapier Source: Dungeon Master's Guide (2024) p. 254