Soul Fire Conversion

Transmutation
Soul Fire Conversion turns an existing fire into Soul Fire. When a target receives damage from Soul Fire, half of the fire damage received is also applied to their max health for 1 day, or until the target takes an extended rest. Constructs and Undead are immune to this effect.

Soul Fire conversion can be used on a previously casted fire spell in which the duration lasts for longer than a single turn. The spell can also be cast before an instantanious spell to convert it into Soul Fire. The caster must use or ready a fire spell within the next round to retain the effect.