5.1. Essence: Fire - noamsm/Wizardry GitHub Wiki
Generation
Put the "Essence Absorber" block on top of a fire. After around 12 essence point the fire will be demolished.

Spells
Normal Spell - Flame Thrower
Lights mobs on fire. When it hits a block, it will spread fire in a radius of 5 blocks.
Consumes 5 Fire Essence.
Sky Spell - Fireball Rain
Summons a rain of fireballs from the sky.
Consumes 10 Fire Essence.
Heavy Spell - Fire Tornado
Shoots a ray that when hits the ground summons a huge fire tornado. The tornado lights every entity that enters it on fire, it lasts for 30 seconds.
Consumes 25 Fire Essence