Claw of Infernus

You slice open your arm causing blood to wrap around your flesh, transforming it into a infernal weapon. As apart of the same bonus action, you can make a melee weapon attack with the weapon this spell creates. You can make this attack again on each of your turns as a bonus action for the duration of this spell.

The weapon has a range of 10 feet, and it uses either your Strength or Spellcasting modifier for attack and damage rolls (your choice). It has a +1 bonus to damage rolls, and deals 1d8 slashing damage in addition to your modifier. This weapon remains until you lose concentration, or until you use an action to dismiss it. While this spell is active, you cannot wield two-handed weapons or dual wield weapons. If you cast this spell at 5th level, the bonus to damage rolls increases to +2, and if cast at 7th level, the bonus increases to +3 and the damage increases to 2d8.