Arcane Spike

A spear made out of cosmic energy forms in your hand. You throw the spear at a creature within range.
Make a ranged spell attack. On a hit, the target takes 10d12 force damage.
If the target is large or smaller, it must make a Charisma saving throw or become pinned to the ground by the spear, reducing its speed to 0 until the end of your next turn.

When you cast this spell using a spell slot of 6th level or higher, the damage increases by 2d12 for each slot level above 5th.