So there is no choice.
I would propose a choice based on my Might&Magic 7 gaming experience - the storyline is exactly about a choice between Light and Dark side.
Perhaps it will inspire some dev
In Might&Magic 7 universe a caster goes trough 4 levels of knowledge (Skill) in any school of magic:
Normal
Expert
Master
Grandmaster
to be referred as: N,E,M,G and Spell Points as SP.
Light spells:
Dispel Magic SP cost 15
N: Dispel all spells on all creatures in sight
E: Fast recovery time
M: Faster recovery time
G: Fastest recovery time
Destroy Undead SP cost 10
N: Inflicts 16+(1-16 per Skill Level) points of damage to target creature, undead only
E: Fast recovery time
M: Faster recovery time
G: Fastest recovery time
Light Bolt SP cost 5
N: Inflicts 1-4 points of damage per Skill Level to target creature x2 against undead
E: Fast recovery time
M: Faster recovery time
G: Fastest recovery time
Paralyze SP cost 20
N: Paralyzes target creature for three minutes per Skill Level
E: Fast recovery time
M: Faster recovery time
G: Fastest recovery time
Day of the Gods SP cost 30
N: N/A
E: Increases all stats of your character by 3xSkill Level
M: Increases all stats of your character by 4xSkill Level
G: Increases all stats of your character by 5xSkill Level
Summon Elemental SP cost 25
N: N/A
E: Summons a Lesser Light Elemental, duration is 5 minutes, one at a time
M: Summons a Light Elemental, duration is 15 minutes, three at a time
G: Summons a Greater Light Elemental, five at a time
Day of Protection SP cost 40
N: N/A
E: N/A
M: Cast all resistance and protection spells at 4xSkill Level
G: Cast all resistance and protection spells at 5xSkill Level
Hour of Power SP cost 45
N: N/A
E: N/A
M: Cast all boosting and some protection spells at 4xSkill Level
G: Cast all boosting and some protection spells at 5xSkill Level
Prismatic Light SP cost 35
N: N/A
E: N/A
M: Inflicts 25+Skill Level points of damage to all creatures in sight, may only be used indoors
G: Fast recovery time
Sunray SP cost 50
N: N/A
E: N/A
M: Inflicts 20+(1-20 per Skill Level) points of damage to a single creature, must be cast outside and during the day
G: Moderate recovery time
Divine Intervention
N: N/A
E: N/A
M: N/A
G: Restores all Hit Points and Spell Points and cures all adverse condition your party is suffering, caster is aged 10 years
Dark Spells:
Reanimate SP cost 10
N: Returns slain target to life as a zombie who will fight for you until is killed or you leave the map, zombie will have 20 Hit Points per Skill Level up to their normal maximum
E: zombie will have 30 Hit Points per Skill Level up to their normal maximum
M: zombie will have 40 Hit Points per Skill Level up to their normal maximum
G: zombie will have 50 Hit Points per Skill Level up to their normal maximum
Shrinking Ray SP cost 25
N: Shrinks a monster, decreasing the damage it inflicts by 1/2
E: Damage inflicted is reduced to 1/3
M: Damage inflicted is reduced to 1/4
G: Can shrink a group of monsters
Toxic Cloud SP cost 15
N: Fires a slow moving toxic cloud in front of you that lasts until it hit something, inflicts 25+(1-10 per Skill Level) points of damage
E: Fast recovery time
M: Faster recovery time
G: Fastest recovery time
Vampiric Weapon SP cost 20
N: Bestows a nonmagical weapon with the "Vampiric" enchantment, duration is one hour per Skill Level
E: Fast recovery time
M: Faster recovery time
G: Enchantment is permanent
Control Undead SP cost 35
N: N/A
E: Target - undead creature - becomes friendly and attacks creatures hostile to you for 3 minutes per Skill Level
M: Durations is 5 minutes per Skill Level, faster recovery time
G: Lasts until you leave the map, fastest recovery time
Pain Reflection SP cost 40
N: N/A
E: Reflects 100% of damage taken to the attacker (who inflicted damage), duration is 1 hour + 5xSkill Level minutes
M: Works on entire party
G: Duration is 1 hour + 15xSkill Level minutes
Shrapmetal SP cost 30
N: N/A
E: Fires five fragments of hot metal in front of you, each fragment inflicts 6 + (1-6 per Skill Level) points of damage
M: Fires seven fragments, faster recovery time
G: Fires nine fragments, fastest recovery time
Armageddon SP cost 55
N: N/A
E: N/A
M: Inflicts 50 + Skill Level points of damage to ALL creatures on the map, must be cast outdoors, not more then 3 times per day
G: Not more then 4 times per day
Dragon Breath SP cost 50
N: N/A
E: N/A
M: Inflicts 1-25 points of damage per Skill Level to target creatures and all surrounding creatures, including you if you are too close
G: Moderate recovery time
Sacrifice SP cost 45
N: N/A
E: N/A
M: Slays a single hireling*, caster recovers all Hit Points and Spell Points, is cured of all adverse conditions, and any magical aging is dispelled. Casting this spell will decrease the party reputation greatly
G: Moderate recovery time
Souldrinker SP cost 60
N: N/A
E: N/A
M: N/A
G: Drains 25 + (1-8 per Skill Level) Hit Points from every creature in sight and distributes it among the party
Of course, there is some "translation" needed when importing things from one universe to another, but i think it should not be too complicated. M&M 7 party can be very well - for example - translated to TMW party, giving it much more sense and interest in the same time, because of healing effects or hit points sharing (Mardek RPG) affecting whole party, *hireling can be translated to any creature Sagatha like, and bad reputation can cause the same effect as in M&M 7 - the good NPCs stop talking with you.
This is meant to be some inspiration, nothing more. I hope you enjoyed.
) and randomly (1/3) to injured their Caster, and this caster will have to run very fast 
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