Metabot's Manual of Magical Maneuvers

Transfixing Daggers

3-level Transmutation

You cast a flurry of shimmering daggers forward. Each creature in a 20-foot cone must make a Dexterity saving throw. A creature takes 6d4 slashing damage on a failed save, or half as much on a success.
Immediately after casting this spell, you can use a bonus action on the turn you cast the spell to recall the daggers to you from their previous destination. When you do so, creatures in the spell's area who failed the initial saving throw must make a Dexterity saving throw, taking 6d4 slashing damage on a fail, and half as much on a success.
Creatures within 5 feet of you have disadvantage on either saving throws.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the damage of the spell increases by 2d4 for each slot level above the third.