Alba's Piercer

You gather arcane energy between your palms and force it outward.

Choose a creature you can see within range. The target makes a Dexterity saving throw against your spell save DC. On failure, they take 1d4 force damage. If another target is in the line and they fail the saving throw as well, they take an increased damage die of 1d6. A third creature takes 1d8, a fourth takes 1d10, and a fifth takes 1d12 force damage provided they fail the saving throw.
If a creature succeeds the saving throw the projectile continues to the next creature using the last damage die it delt.