Tharn's Glintblade

Summon a spectral blade to hurl at an enemy or object within range. Make an ranged spell attack roll against the target. On hit deal 1d8 piercing damage. Damage is considered magical. Summon an additional blade to fire at a target of your choice at 5th level (2d8), 11th level (3d8) and 17th level(4d8). You can direct the blade at the same target or at different ones. Make a separate attack roll for each blade.