The Grimoire is operated by, Dice Bard has everything you need to play 5e... as long as all you need to play 5e is dice.

Flame Strike 5th level evocation

Casting Time: 1 action

Range: 60 feet

Components: V, S, M (pinch of sulfur)

Duration: Instantaneous

Tags: cleric level5 evocation

A vertical column of divine fire roars down from the heavens in a location you specify. Each creature in a 10-foot radius, 40-foot-high cylinder centered on a point within range must make a Dexterity saving throw. A creature takes 4d6 fire damage and 4d6 radiant damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the fire damage or the radiant damage (your choice) increases by 1d6 for each slot level above 5th.

You can find more information on this spell in: PHB.242