Red Queen

Rare (+1) 2 charges, very rare (+2) 4 charges, legendary (+3) 6 charges 

You have a bonus to attack and damage rolls made with this magic weapon. The bonus is determined by the weapon's rarity.

Blazing Blade- This weapon deals an additional 1d6 fire damage whenever there is a charge in the blade.

This weapon has charged slots based on the rarity of this weapon. Whenever this weapon makes a melee weapon attack that does not use a charge feature and hits a target, it gains 1 charge. You may also use a bonus action in order to gain 2 charges for this magic weapon. The weapon can only ever have a maximum number of charges based upon the number of charge slots this weapon has. Charges are lost after 1 minute if not used, the weapon is sheathed, or if the weapon is dropped. Charges can be used for the following features but only one charge feature can be used during an attack action. 

Double Down- Spend one charge to double the weapon damage for one of these weapon attacks. You double only the number rolled for weapon damage then you add any modifiers to the damage roll. You can only use this feature after you have hit a target but before you roll for damage. 

Shuffle- Spend one charge when a creature targets you for an attack and misses. Make a melee weapon attack with this weapon against the creature who targeted you for the attack and missed. 

Roulette Spin- Spend two charges to spin around making a melee weapon attack with this weapon against every target within melee attack range of the user.

Red Streak- Spend 3 charges to take the dash action in a straight line coming to a stop if any creature or object blocks your path. Make a melee weapon attack with this weapon to all creatures or objects within melee attack range of the user as you move along this line. This feature does not trigger any opportunity attacks.

Proficiency with a Greatsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Heavy, Two-Handed, Graze