Biting Barrage

You imbue several cards with ghostly necrotic energy. Make two ranged spell attacks against the creature to assail it with the chill of the grave. On each hit, the target takes 1d4 necrotic damage. If both attacks hit, the second attack's damage is doubled and the target can't regain hit points until the start of your next turn. Until then, the cards are imbedded into the target.

On any hit, if the target is undead, it also has disadvantage on attack rolls against you until the end of your next turn.

This spell's damage increases by 2d4 when you reach 5th level (4d4), 11th level (6d4), and 17th level (8d4).