Crimson Bolt

You launch a bolt of blood at a target within range. Make a ranged spell attack. On a hit, the target takes 3d8 necrotic damage and is covered in thick blood, which reduces their movement speed by 5 feet for a number of rounds equal to your spellcasting modifier. The movement reduction cannot lower the target’s speed below 15 feet.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 and the movement reduction increases by 5 feet for each slot level above 1st.