Trushman's Fire Spire

You create a pillar of fire within range. The pillar is 60 feet high, and 15 feet in diameter.

When the pillar appears, each creature within its area must make a Dexterity saving throw. On a failed save, a creature takes 8d6 fire damage, or half as much damage on a successful save. A creature takes the same damage when it enters the pillar for the first time on a turn or ends its turn there.

As an action on subsequent turns you can move the pillar up to 30 feet.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 2d6 for each slot level above 4th.