Surge, O Flame

You release a stream of fire in a line 10 feet long and 5 feet wide from yourself. Each creature in the line takes 2d4 fire damage.
On subsequent turns until the spell ends, you can use your action to continue releasing the fire. When you continue releasing the fire, you can choose to change the direction of the line. If you take another action, the spell ends.
At Higher Levels.
When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d4 for each slot level above 1st.