I've statted out a god of magic for my homebrew setting. Some of the SDAs I've assigned are:
Alter Reality
Arcane Mastery
Avatar
Craft Artifact
Create Greater Object
Create Object
Deny Magic*
Divine Spellcasting
Instant Counterspell
See Magic
Spontaneous Wizard Spells
* I created a salient divine ability which I felt was missing for a god of magic.
Salient Divine Ability: Deny Magic
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Prerequisite: Divine rank 16+, Magic domain, Alter Reality, Arcane Mastery, Divine Spellcasting
Benefit: The deity can deny the ability to use magic to a creature within range of its senses. This restriction prevents the creature from casting spells, using spell-like or supernatural abilities, or using spell-completion or spell-trigger items. This ability can affect any creature with no divine rank or a divine rank lower than the deity. An affected deity can still use its salient divine abilities (under the theory these transcend magic in the traditional sense).
The deity can affect up to one creature per divine rank with this ability. Each creature affected counts towards this limit for the duration of the denial. The denial lasts one day per divine rank, or until dismissed by the deity (a free action), whichever comes first. However, the deity can re-impose the denial if desired, as long as it has the capacity available to do so.
Don't know if any of that would be useful for you. If your god of magic is an epic level caster and has alter reality as an SDA, he/she/it is essentially unlimited in power. This is because of the way the epic spellcasting rules work to create epic spells based on the final spellcraft DC. Since the spellcraft DC for an epic spell can be reduced by including additional casters donating spell slots to the ritual, the deity can use Alter Reality to create as many simulacra of itself as desired. If these simulacra are capable of casting even 1st level spells then the deity can use the epic spellcrafting system to make amazingly powerful spells that will end with a final spellcraft DC of 0. For example, the deity could use the fortify seed to boost all its ability scores to something ridiculous, say like 1000. Then they could use Alter Reality again to make that spell effect permanent. With enough manipulation of this situation, the deity can have effectively infinite power.
The point of the above is that a god of magic should probably have no reason to fear a mortal. It'd be cool to see the stats of the PC, though.
