Blood Bolt

Choose two creatures within 60ft. Choose one to make a constitution check (or they can be willing); on a fail they take 1d4 damage and a bolt of the first creature's blood is shot at the other one dealing 1d4 damage.

The spell creates more than one bolt when you reach higher levels: two bolts at 5th level, three bolts at 11th level, and four bolts at 17th level. You can direct the bolts at the same targets or at different ones. Make a separate attack roll for each bolt.