Dragon Slayer Greatsword

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.

Graze (Mastery): If your attack roll with this weapon misses a creature, you can deal damage to that creature equal to the ability modifier you used to make the attack roll. This damage is the same type dealt by the weapon, and the damage can be increased only by increasing the ability modifier.

Heavy: You have Disadvantage on attack rolls with a Heavy weapon if it's a Melee weapon and your Strength score isn't at least 13 or if it's a Ranged weapon and your Dexterity score isn't at least 13.

Two-Handed: A Two-Handed weapon requires two hands when you attack with it.

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