Bihari's Knife Trick

Upon casting, three prepared throwing daggers appear in the caster's hands. On that turn, the caster must use her bonus action to throw two of the blades. Make a separate ranged attack for each dagger thrown. The daggers act as finesse weapons that do magical piercing damage. Upon hitting the target or missing it, the dagger disappears and reappears in one of the caster's hands. On each subsequent turn until the spell ends, if the caster uses her action to throw one of the blades, she can again use her bonus action to throw two more blades. All blades thrown reappear in the caster's hands. If the caster uses an action or a bonus action to do anything other than throw blades, the spell ends.