Eldritch Brand

You choose a creature you can see within range and mystically brand it as your foe. Until the spell ends, you deal an extra 1d6 force damage to the target whenever you hit it with a weapon attack, and the creature has disadvantage on spell saves originating from you while the target can see you. If the target drops to 0 hit points before this spell ends, you can use a bonus action on a subsequent turn of yours to brand a new creature.