Deflagration

[Evocation] [Fire]
Level: [Arcane 7], [Nature 7]
Components: [S] and [V]
Casting Time: 1 Standard action
Range: Medium (100 ft. + 10 ft. per CL) @{MediumRange} ft.
Effect: 1 Creature and others within 10 ft. of affected creature
Duration: Instantaneous, and up to 5 rounds
Saving Throw: Reflex half; reflex negates
Spell Resistance: Yes

Focus: At least a +3 focus

You line your focus up with your target, and they erupt into a ball of fire. The direct subject of this spell will take 1d6 heat damage per caster level (Max 15d6). A reflex save will reduce this to half. Either way the subject will become engulfed in flames and take another 5d6 heat damage a round for 5 rounds. Any creature within 10 ft. of the target during the initial burst or every round the target is on fire must make a reflex save or also burst into flames for the remaining rounds. A burning creature can spend a full round action and fall to prone and put themselves out.

VTT Macro Description:
@{character_name} lines up their focus with their target, and they erupt into a ball of fire. They must make a reflex save for half. Either way they combust and will burn for 5d6 damage for 5 rounds. And creature within 10 ft. of the main target will also combust on a failed reflex save, and burn for 5d5 fire damage for the remaining rounds.

VTT Number of Dice formula: [[{@{cl},15}kl1]]

Suggestion: Make a macro on your character's sheet for [[5d6+(@{SpellProf}*5)]] for the burn damage.