This spell is titled Magma Ball but actually fires a "Fire Bolt" which is an innate ability spell effect available to the Flaming Skull creatures in the game saga.
Internal AI scripting text labelling identifies this spell as "Flaming Skull Bolt".
Gameplay[]
The innate spell effect is a quick casting offensive damage spell.
A Fire Bolt projectile is launched at a single target in range.
It will unerringly strike the target and inflict 4d10 Fire damage, however if the victim makes a Saving throw vs. Breath (with a -1 penalty), then the damage is halved.
The Fire Bolt ignores magic resistance and has 2 Power level, and thus can be blocked by spell protections like Minor Spell Deflection or Minor Globe of Invulnerability.
The spell also forces the caster to "Pause" for a 1-second duration