Vortex

You create a swirling cylinder of fire centered on a point you can see within range. Any creature inside the cylinder when it is cast makes a dexterity saving throw. On a fail, the creature takes 4d4 fire damage. On a pass the creature takes half damage. Any time a creature starts its turn inside the vortex it takes 2d4 damage.

At higher levels, increase the initial fire damage by 2d4 and the damage when starting their turn in the vortex by 1d4, per level cast above 1st.