Fireball

Evocation [fire]
Tier: 3
Components: Verbal, Somatic
Casting Time: 1 major action
Range: 360 ft
Area: 20 ft radius spread
Duration: Instantaneous
Saving Throw: Reflex half
The little ember lands in the midst of the charging orcs. The fiery explosion briefly silhouettes those at the head of the charge before they too are devoured by the flames.

You launch a tiny, smoking ember from your hand. It lands within one square of the target (Roll 1d20 to determine precise location. On a roll of 1-8, the projectile scatters to a square adjacent to the target. On a roll of 9-20, it lands on the target square.)

The moment it impacts, it detonates, dealing 5d6 points of fire damage to everything within the area. If the fireball does enough damage to a barrier, it can break through to the other side.

Augmentation:
For each extra spell point you invest, you can increase the damage by 1d6 (up to a maximum total of [caster level] d6).

If you cast this as a tier 4 spell, creatures that take any damage from the spell must make a Strength check against the spell’s save DC. If they fail, they are knocked back 10 ft from the fireball’s origin and fall prone. A target which is forced into an obstacle takes 1d6 points of damage. If you cast the spell in this way, the spell’s scatter is now rolled on a d12. On a roll of 12, roll again on a d8; the fireball scatters 1 square farther from the center.