Blood Spike

You conjure a frosty spike made of blood and hurl it at a target. Make a ranged spell attack against the target. On hit the target takes 1d4 of cold and 1d4 of piercing damage. If the target is killed by this spell and isn't immune to cold, their body is preserved and can not decay. They will be forever frozen, but not below 20 degrees Fahrenheit.

This spell's damage increases by 2d4 when you reach 5th level (4d4), 11th level (6d4), and 17th level (8d4). Half of these rolls are cold, while the other half is piercing.