The Blade of the Righteous

You can create a 2 handed weapon as part of your Pact of The Blade feature. Instead of having to hold the weapon, the weapon hovers around your immediate vicinity as if almost attached to your being. You can attack with the weapon as if you were holding it, using the sheer force of your connection to your patron. Additionally this frees up your hands to be able to cast spells.

If you fall unconscious, while making death saving throws, the blade still hovers around your body, and your drive to survive allows the weapon to still function. You can make 1 attack roll to any enemy within 5 ft. of your unconscious body while making death saving throws.