Black Blade of Disaster

You create a black sword-shaped planar rift within range, lasting for the duration. When the sword appears, you can make a melee spell attack against a target of your choice within 5 ft. of the sword. On a hit, the target takes 5d10 + your spellcasting modifier force damage. If the sword critical hits, the target must succeed at a Constitution save, using your spell save DC, otherwise it succumbs to the planar forces and is disintegrated.

The blade can pass through magical barriers of equal spell power or lower, except for Improved Force Barrier. It cannot however penetrate dead magic areas, such as antimagic fields or an area under the effect of Mordenkainen’s Disjunction.

Until the spell ends, you can use a bonus action on each of your subsequent turns to move the sword up to 20 ft. to a spot you can see and make another attack.