I dunno why this ain't a thing, but whatever, I'll make some spells. If someone else wants to add spells to this category I am more than happy to do so.

Shock- The caster touches the target and releases a small amount of electricity into the target. Even if the target doesn't take damage any spellcasting is interrupted.
Uses 5 mana. Deals 5 damage. Roll 1 dice with 6 sides. Roll 1 or 6 to land damage. Touch range.

Spark- A spark of electricity leaps out of the caster's finger and onto the target.
Uses 10 mana. Deals 10 damage. Roll 1 dice with 6 sides. Roll 1,3 or 6 to hit. Close range.

Crackle- A light blast of lightning blasts out of the caster's fingers and into the target.
Uses 20 mana. Deals 30 damage. Roll 1 dice with 6 sides. Roll 1,3 or 6 to hit. Close range.

Lightning bolt- A blast of lighting blasts out of the caster's fingers and into the target.
Uses 30 mana. Deals 40 damage. Roll 1 dice with 6 sides. Roll 1,3 or 6 to hit. Mid range.

Twin lightning bolt- Two blasts of lighting blast out of the caster's hands. One out of each hand. The two lightnings have to hit different targets.
Uses 40 mana. Deals 40 damage. Roll 1 dice with 6 sides. Roll 1,3 or 6 to hit. Mid range.

Lightning mantle- A curtain of lightning forms around the caster. The caster becomes immune to lightning. Any lightning spells thrown at the mantle will be absorbed into giving the mantle an extra free round of upkeep. The mantle can absorb up to 25% of a spell's damage to a total maximum of 200. Once the total of all the damage absorbed from different spells reaches the 200 limit the mantle will disappear. Lightning spells don't count towards the damage total.
Uses 60 mana. Uses 10 mana per round to keep up. Takes 2 turns to cast. Takes effect only in the melee range of the caster.

Thunder bolt- A powerful blast of lightning blasts out of the caster's hand and into the target.
Uses 70 mana. Deals 70 damage. Roll 1 dice with 6 sides. Roll 1,2,3 or 6 to hit. Mid range.

Chain lightning- A blast of lightning leaps out at the target. If there is anyone else within melee range of the caster, the lightning my leap onto them and will continue leaping until it can no longer hit someone or fails to hit all available targets. The lightning can't leap onto the same target twice.
Uses 80 mana. Deals 30 damage. Roll 1 dice with 6 sides. Roll 1,2,3 or 6 to hit. Takes 2 turns to cast. Mid range.

Lightning storm- A cloud appears in the sky and rains down 10 lightning strikes, divided equally between everyone in the affected area. The cloud is 5m in diameter and strikes only right under itself.
Uses 160 mana. Deals 30 damage. Roll 10 dice with 6 sides. Roll 1,2,3,4 or 6 to hit. Takes 3 turns to cast. Long range. Deals damage to the caster and any allies.

Aria's Strike- A lightning bolt sent by the godess of the sky herself. Requires for the caster to be a follower of Aria.
Uses 200 mana. Deals 150 damage. Roll 1 dice with 6 sides. Roll, 1,2,3 or 6 to hit. Takes 2 turns to cast. Long range.

Spark of life- A passive ability that instantly shocks the person back to life if they died from their heart stopping. Doesn't work if the target dies from old age.
The ability can only be used once. Costs 2000$.

Enchanting idea:
Enchantment: Spark- Charges a wand or melee weapon with the ability to use spark once every 2 rounds. Has only 10 charges. Can be recharged every week for 100 mana and 100$.
Uses 200 mana and 500$ to enchant. Takes 6 hours to cast.
Dunno if you have some other ideas in terms of what materials to use for enchanting, etc. I am not familiar with the SRT system when it comes to this.