Elstren's Maiming Dash

You brand is your weapon, and with blinding speeds you dash from 10 to 80 feet in a direction of your choosing making melee attacks against all creature within 5 feet of the line. On a hit, the target suffers the weapon attack's normal effects along with suffering disadvantage an DEX and STR saves until the end of your next turn, disadvantage on attack roll until the end of your next turn and an additional 5d8 magical slashing damage. You also end the spell at the end of the line you dashed

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, you deal and additional 1d8 damage for each slot level above 5th