Clot

Once you use this evocation the blood in your opponent’s veins begins to clot up. This creature must make a constitution saving throw. If they fail this check the spell fails and is void. If they fail the creature will take 1d4 per level used of this spell for every turn they take. This is at least as long as you can maintain concentration or they succeed on their saving throw the next turn.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d4 for each slot level above 1st.